Boyfriends sister

Hey mommas

My boyfriends sisters been driving me nuts she always has something to say and it's never positive.

Every ultrasound pic I get she's like oh he looks like his brother oh jesus hes gonna be a mini version of his brother just to annoy me.. than she said something about how my dog goes to the bathroom in the house like when he was a puppy he was very hard to train but he's trained now. And we were gone for 4 hrs one day and he went on the pad. Well she showed up literally as soon as we pulled in and before I could even clean it up she stepped in it. And than says something like oh i thought he was trained. It's like she has a cat and a bunny and the bunny poops everywhere and the cat sprays but talks about my dog. I clean my house on the regular i mope 3-4xs a week it never stinks etc.

She told me I better not be to gready when it comes to the baby it's like no. If i wanna be gready im gonna be gready. She told me that she'll come see him whenever she wants how shes his aunt and this and that I honestly can see us fighting agian soon specially once the babys here cause my boyfriends family is very ignorant and I got into a argument with his mom once

And his sister got involved than his brothers gf got involved than his dad it was a mess and I know if it comes down to it it'll be like that all over agian which I DON'T want. But it's just how I feel. His familys the type to MAUL THE baby literally maul him. And it annoys the shit outta me cause what i say they ignore ...

Advice ?

Please no bashing