FTM here!!

So..I've been lurking
on here ever since I got my BFP in August but never had a need/desire to post until now. However, my 3 month old son has recently started having fits of pain with what seems to be teething. (Swollen gums, wanting to chew on anything, moans when gums are rubbed) I've tried to relieve him with cold rags, teething rings, and finally my (CLEAN) finger. Well, MIL finds out from DH that he's cutting teeth...and comes over from her job at the bank.We don't have the BEST relationship anyway because she can be a little pushy when it comes to how careful I try to be with DS. Anyways, she comes in and I give him to her and walk in the next room to wash his bottles while she spends time with DS. In the meantime she asks "so you think he's cutting teeth?" And I reply with "yes I'm pretty sure because.. (list of symptoms)" and she says "yeah he must be because he's wanting to chew on something." I look up from washing bottles (I have a window opening that looks into the living room) and sure enough she has her finger in his mouth! She didn't wash her hands, ask if I minded, nothing!!! At this point I'm fuming but play dumb and say "oh Is he chewing on his pasi or something?" And she replied "no, my finger." I don't respond due to the fact I thought I would spit fire I was so mad. I realize it was my fault that I didn't ask her to wash her hands to begin with! But I honestly didn't imagine she would be sticking her fingers in his mouth!! And I try to be careful with what I say around MIL anyway because she feels like she's raised 3 and knows the ropes. And when I have asked her to not do things with DS she ignores me and pretends I didn't say anything. So what I really want to know...is...am I overreacting by not wanting this to go on? How do I handle this situation without causing WW3 but also taking care of my son? Cut it to me straight...
Re: Am I overreacting? LONG! Opinions appreciated
But...I guess it is more sanitary to wash your hands, so I could see why you would be upset. You don't need to make it a big deal though. Just remind her to wash her hands next time.
Started dating February 6, 2012
You're right that it's gross, and you are overreacting. Next time you see her do it, just say, "please don't put your nasty, money handling hands in my kid's mouth."
And if she argues, just say "please humor me. I am a crazy mom, but I can't help it."
Chew toy sounds like a dog toy but you know what I mean
@Avion22 I agree she could have possibly washed her hands before, but I usually assume she hasn't due to the fact she has never really been precautions about things like this! But I'm bad scout jumping to conclusions anyway