A few months back, we had a general marriage advice thread that was very helpful to me, and hopefully to others. I was wondering if anyone had general advice on how to improve a relationship with your in-laws. My relationship with all my ILs is difficult, and I would love to get to a point where I wouldn't dread a supper with them.
Edit: This turned into a post where I basically just bash my in-laws, and that wasn't my intention. I hate bad-mouthing anyone, even when it's well deserved. I know they're special in a bad way, and that our relationship will never be great. However, for my H and Tumaini's sakes, I'd like to be able to handle a meal with them once in a while. I won't delete anything, because it would be confusing for everyone new to the thread, but if you want to skip all my posts and just post some general advice at the end of the thread, for my benefit and for everyone else dealing with difficult in-laws please do so.
For exemple, it was suggested that each partner deals with his side of the family. From now on, H will be the one running inside and moving the peanut bowl from Tumaini's reach, and I'll ask him to talk to his parents once again regarding her allergies.
Thanks everyone for your support.

Re: IL relationship advice - Edited
A big source of conflict right now is Tumaini's allergies. She has a serious egg and nut allergy, and I never go anywhere without her epipen, I'm super diligent on letting people know about her allergies, etc. My ILs don't seem to grasp the concept that allergies are a health-problem, and giving her eggs/nuts could seriously harm her. EVERY single time they invite us over, they put a bowl of peanuts on the coffee table in the living room, beside other snacks they encourage Tumaini to eat. So everytime, I need to rush inside before my kid, remove the nuts, and remind my ILs not to put the nuts within her reach because she's too young to understand she can't have any, while other people can.
This happened at Easter. Once again, they gave me the side eye when I put the peanuts on the kitchen counter, and reminded them politely to please not put them there next time. Then, my MIL took out a dip with eggs. I told her she could have some cucumbers, but no dip. I turn around, my MIL is about to feed her a piece of cucumber WITH dip, and is a few inches from Tumaini's mouth. I yell NO. She jumps, turns around, and starts yelling at me: "What is your problem? Why would you yell like that at me?". I apologize for yelling, but told her I felt I had to yell because of how close she was to feeding my child eggs. My FIL cuts in with "I heard it's good to give them allergens in small dose, it helps cure the allergy". WTF I tell them my allergist is not comfortable with that approach.
Supper is over, she takes out the desert. I go to Tumaini's bag and take out her Rice Krispie square. MIL : "What is that?" Me : "I didn't want her to feel left out at dessert, so I brought her something". She answers : "I made crème brulée, with no eggs". I look at H for help, but he's no cook. I say, "I'm sorry, I've never heard of a crème brulée with no eggs. Did you make it yourself?", she says yes, I ask "From scratch", she says no, I added things to the powder. I ask for the packaging, she says she threw it away, but that there were no eggs in it. I give H a hard stare till he gets up, goes to the garbage, finds the packaging, reads the ingredients where eggs are in the top ingredients. My ILs but give me a death stare, and don't talk to me for the rest of the meal...
Wow, that was long. I want to slap them all over again. I think this is hopeless...
She also spreads rumors about me that aren't true. We didn't mail out her wedding invitation, because we were going to give it to her in person when we saw her that week-end. Her best friend got her invitation on Thursday. Friday, we hear that she's been telling everyone she's not invited to her little baby's wedding, and that I'm a b****. We had discussed wedding plans with her, she knew she was expected to be the wedding.
When I gave birth, after 40 hours of labor, she showed up at the hospital for EIGHT hours, and refused to leave when I told her I needed to rest. She then got mad at me when she took H down to the cafeteria for a long supper, and I called him up when the nurse came, because I needed his help. She said I was being selfish. The nurse had asked I call...
I would invite them over, but his brother doesn't want to come here because I won't let them smoke in the appartment, and him, SIL and MIL smoke all the time. So whenever there's a family gathering, it can't be here. I'm preparing the supper on Sunday, but we're bringing everything over to his brother's house to cook it, because FIL said it was unreasonable to expect MIL to make the meal for Mother's Day.
I think they're just special snowflakes, and maybe all the effort on my part couldn't fix this relationship. I keep putting up with them for my H's sake, because he's always disappointed (but understanding) when I tell him I won't be going with him to see them. To be fair, most of the time he goes to see them, I stay home. I make an effort on special occasions, but that's it.
It also sounds like your H is allowing them to walk all over you. It is ridiculous that three grown adults cannot go outside to smoke if you have dinner at your house. It is ridiculous that you have to cook and carry a meal over to someone elses house.
I know that you want to mend fences and get along but it has to be a two way street. Your IL's have to be willing to try and want a good relationship as well.
My MIL is also a habitual line crosser that feels her way is best. The way I have since been handling her is by being firm yet polite. I don't give her an inch. I think she senses I'm not playing because she hasn't tried me since the bangs incident. Well except when she said she didn't like the new baby's potential name, to which I simply replied I didn't ask for her opinion
Married: 5/21/05 **~** Emery Aylin 6/30/12
BFP#1-11/5/10- Surgery for ectopic pregnancy 11/15/10 BFP#2-11/1/11 Due 7/8/12 Born 6/30/12
Oops we did it again... BFP 03/23/14 Due 12/6/14 Nora Born 11/23/14
And big hugs because I'm frustrated for you.
Married: 5/21/05 **~** Emery Aylin 6/30/12
BFP#1-11/5/10- Surgery for ectopic pregnancy 11/15/10 BFP#2-11/1/11 Due 7/8/12 Born 6/30/12
Oops we did it again... BFP 03/23/14 Due 12/6/14 Nora Born 11/23/14
I'm going to start taking a firmer stand for the things that are really important to me. H will talk to them again about the allergy issue, and make sure that we'll be taking a zero tolerance approach to any related situation. If peanuts are within her reach, we leave; same if they try to feed her something with eggs/nuts.
I also told H that we could have supper there, and I didn't mind preparing the food (plus side of this is I can make the meal of my choice, including the dessert), but I wanted to go out for a lunch picnic just the three of us. At least I'll still get my special moment during the day.
I would suggest meeting them at your house so you can control what you eat. Also for the future may be you can go to the zoo or theater with them and Tamiami so they would feel more included in your life. To mend relationship both side should be open to the change... From what you described your inlaws don't want to make any effort in the right direction.