I wanted to get some opinions from you ladies on how to handle this...
Does anyone have any experience or know anyone who is polyamorous? My sister recently informed us of this part of her life, and while I want her to be happy and she is an adult free to live the way she wants...my husband and I have discussed this and do not want our children to be around this type of situation. I am struggling with this because normally I consider myself a pretty tolerant person. We are Catholic, so this goes against some deeply held beliefs. I know that many of you may disagree with me, but I am looking for a way to establish boundaries without creating a rift in the family.

any suggestions?
Re: Polyamorous family member
Formerly known as Kate08young
August '18 Siggy April Showers:
Married: 7/22/14
Baby L: 8/4/2015 August 2015 Moms
Baby E: 11/18/2016 December 2016 Moms
TTC #3 08/2017 BFP 11/27/2017.
Twin B lost 11/22/2017, Twin A doing well.
I am all for people living the life they want to live, and it doesn't effect me so whatever. But, in your case... it does. I agree with @Kate08Young and putting the rule out there that she mentioned, since you are not comfortable with it all. I get that you don't want to cause any rifts, and I think it's fair.
TTC Since: November 2015
BFP: March 31, 2016
DS: November 21, 2016
I believe that as the adults in the situation you can explain to the person in your life/your child's life that this is to be kept separate from their experiences and interactions with them. Meaning, you as an individual may have a relationship with my child, but for now, I'd prefer for us to leave this aspect of your life out of the equation. As the child matures, if the situation/experiences/qualities are still relevant you can then re-evaluate and share it with the child. Hopefully the person in question will respect those boundaries, and if they aren't able to, then you can detach knowing that you gave them a scenario of interaction that you and your husband were comfortable with and it was their choice on whether or not to accept it.
With that said, from my understanding, I don't think it is as simple as saying "I'm poly" because being poly can mean many things. Does she plan on living with more than one partner at a time? Does she have a partner now but she'll continue to date casually? Every poly person/couple has different rules and boundaries. She may never introduce another partner to you and your family, or she may have 2 partners she wants to include at family events.
I don't know if this is the type of answer you're looking for, but this is what I would do. Your beliefs are your beliefs and you have every right to raise your family as you see fit with the beliefs and morals that align with yours. I, personally, though try to expose my kids to as much diversity as possible and would be hesitant to exclude someone from my children's lives or prevent them from being their true, authentic selves around me/my family, especially another family member. I don't like the overarching message that sends my children and I wouldn't want my kids to feel like THEY couldn't be themselves or hide part of themselves from me. I've had too many friends live in closets for far too long.
I would look at this as a learning opportunity for my children that not everyone believes the same things we believe or lives life exactly as we do. I wouldn't spend much time worrying about what your kids would think, rather wait and see how your sister's polyamorous lifestyle progresses and deal with questions as they come.
Kids don't really get caught up in things like this and you don't really have to go deep in explanation unless your kids are teenagers. For example, my best friend is bisexual and is currently dating a woman. When she brought her girlfriend to our house, we were talking to my oldest about how she was coming with her girlfriend to hang out with us. He exclaimed "[Friend] has a girlfriend?!" to which my husband and I responded "yup! Her name is [name] and she's so awesome! We can't wait for you to meet her." Convo closed and my son adores BFFs GF. I also was watching a show about a transgender girl (Jazz Jennings) and my son was around. There was some conversation on the show about how she was born a boy but always knew she was a girl. My son asked about it, so I said "you know, sometimes boys are born in girl bodies and girls are born in boy bodies so they make their outsides match their insides." "Ok, cool. I'm lucky I'm a boy on the outside AND the inside, that seems hard!" "Yup, buddy, it is." Convo over.
Heck, I remember being a child and knowing my mom's uncle was gay (this was in a small town in the 80s/90s when being gay was still a terrible thing in the majority's eyes) and not really understanding or caring about who he loved. I just knew he dated men and that some people didn't like that, but that he was basically the coolest person ever and I loved him.
I was raised Catholic but am clearly very liberal. So, if I were you in your situation and my child asked me about Aunt's two friends, I'd probably say something along the lines of "you know, sometimes people love more than one person like Daddy and I love eachother at a time. Daddy and I don't agree with that and choose to only love eachother as husband and wife." This is part of parenting, giving age appropriate anwers to questions, answering just what the child asks and not giving too much information, and understanding that you can shelter your kids as much as you want, but they'll eventually find the answers to their questions and I'd rather they come to me than go to Google.
With that said, I'd hope she wasn't bringing random people around, only people she's in serious, committed relationships with. I wouldn't let her bring every Tom, Dick, and Harry into my home/around my kids and that stands whether she's poly or monogamous. I don't want to meet someone unless they are serious when my kids are around.
TL;DR That got wordy! You are entitled to your beliefs. You can shelter you kids for some time but they'll eventually figure things out so you're better off exposing them and answering any resulting questions so you can control the answer, kids don't really get that caught up in things. But no bringing random people around my kids, whether they are boyfriend #1 or #5 - I don't want anyone around my kids you're not serious about.
How you chose to raise your children is up to you and your DH. But kids know when something is up and ask questions. I agree with PP, to explain it to them if it comes up. But I don't see anything wrong with you not wanting your sister to bring random strangers around your kids that she probably will never see again, although poly doesn't equate to constant hooking up. They date the same as monogamous people do, form relationships the same way monogamous people do, and have break-ups like monogamous people do. They just have relationships with more than one person at a time, and usually their partners are aware of and okay with the other partners.
TTC since 6/13
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I personally couldn't do it, and don't exactly get it...but it works for some. I can't judge people for it, because I would never judge someone for being gay. You love who you love.
@gardengirl3 Granted, I don't know much about the polyamorous lifestyle. As far as I know, I have never met or been friends with anyone living this lifestyle. And I can understand wanting to raise your children with your values and beliefs. I am atheist, and my fiancé is Catholic, though not very religious. But some of his family, and especially his mother is. My future MIL goes to church every day. So I anticipate lots of religious conflicts with raising this baby. I doubt the conflicts will be between me and my fiancé, since we have discussed this and come up with a plan already. They will come from my future MIL.
But that is the point of my response. Talk it out and have a plan. Sit down with your sister and explain to her exactly how you feel, give her the opportunity to explain exactly what she means and how serious her relationships are. Maybe you can compromise with her only bring partners she is serious about around your kids. I feel that without at least trying to compromise, you might create that rift you were trying to avoid, plus depriving your child(ren) of a loving aunt. I can tell you from experience that my aunt, though not polyamorous, had many BFs when I was a kid. Every year or so there was someone new she was living with. And you know what...I don't remember any of them, except for the one she was married to for a few years, and probably only because I was older, in my tweens to teens. It may be that your kids don't even remember a lot of the people your sister might bring by.
Also, having been with my fiancé for 5 years, I have learned through his mother and family that Catholic beliefs can be deep rooted. But that family feelings are even stronger. His Catholic family are very accepting of his 2 gay cousins. And my best friend is a lesbian. Personally, I would equate not allowing a polyamorous person around my child the same as not allowing a gay person around my child. I can't even conceive of the idea of my best friend being blocked from my baby's life. So, I have to believe there is a happy medium that you and your sister can reach.
As to teaching your kids your values, when they ask about their aunt, you could just tell them that not everyone lives and loves the same. You may not agree with all the different ways of life, but you love an respect everyone's right to choose their own path. Including your sister.
Well, I hope I don't sound too preachy or obnoxious. I tried to give my opinion as respectfully as I could.
It might just be our kids (who don't watch tv, or are on devises much at all and who are homeschooled) but they are very niave and have genuine innocence about such things... It's really surprised me how much we have to intentionally explain to them. It's far more than I anticipated. At the same time I can see that they are able to just love and accept others in compassion, which is our main goal.
Personally, I'd just share your heart with your sister and ask that she be tactful in her actions and understanding of the confusing nature of her life to a little person. Or just bring it up if it becomes something that you think is confusing your child as they grow up.
Due December 27th with baby #7
Obviously the decision of when to discuss this with your children is completely up to you guys, and how you present it is going to be a huge choice. I think the most important thing to tell your sister that you do not want that part of her life to intersect with your children, not to discuss the situation with them, and if she wants them to meet someone in her life, it better be a long term relationship, not someone she is casually seeing.
Hope this helps, if you want to talk more about it, let me know. I am always available to talk.
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I also have to add, I see nothing wrong with having "strangers" around your kids..I'm confused by everyone's issue with this. I take my kid to birthday parties all the time with "strangers" there and a few of our single friends bring people they are dating to day-time cookouts or parties our kid is it. I really don't see how your sister bringing someone she is dating to a party is "harming" your child, even if she is bringing two people. Again for now, and for a few years, they will have zero idea.
I also don't think older children are confused when you say "this is Uncle Steve's friend, Amy", if it's a "stranger" to them.
Formerly known as Kate08young
August '18 Siggy April Showers:
Married: 7/22/14
Baby L: 8/4/2015 August 2015 Moms
Baby E: 11/18/2016 December 2016 Moms
TTC #3 08/2017 BFP 11/27/2017.
Twin B lost 11/22/2017, Twin A doing well.
I also agree with most of what PPers are saying and wish you luck as you find the best balance for everyone in your life, @gardengirl3