DH’s sister & I have never been close - she spent the first few years of our relationship being extremely hostile & territorial over DH, and things never really improved. We live locally but don’t see each other regularly / never text etc. I find her extremely domineering, she constantly makes passive aggressive comments & she’s really competitive too.
Apart from replying to DH’s text to let her know I was pregnant, she hasn’t mentioned my pregnancy / her future niece or nephew at all - even when we’ve seen her, it was like the elephant in the room. I absolutely wasn’t expecting it to be all about me but for her not to acknowledge it at all was extremely odd. Any time it came up in conversation (like if PIL mentioned it) she would just change the subject. Very bizarre and the total opposite of how the rest of the family / our friends have been.
Fast forward to a couple of weeks ago and she has announced she is pregnant & our babies are going to be a couple of months apart. Since then she’s been constantly going on about how the cousins are going to be ‘besties’ and do everything together & it’s started to really wind me up!! I don’t enjoy her company and I don’t want to be stuck doing everything with her from now on just because it now suits her to play happy families. AIBU to think that you can’t just do a 180 and suddenly be super close with someone when it suits you?