My boyfriends mom?

I’m 19 (keep in mind please) living with my boyfriend his sister, her husband, and her two toddlers and new born. It’s a lot mentally very overstimulating. That’s a whole other can of warms but anyways. My bfs mom has come over and spent the night in our living room for a whole week a couple different times and she always makes these comments that are slight digs at me and his sister told me she’s like that she just is jelouse that her son treats me so good and she’s never been treated good. Her words not mine. My bfs sister told me that when her and her mom were on the phone she was sitting the pot and talking about how my boyfriend will want kids one day and I asked my bfs sister to wait ur mom wants me to have kids what. And she’s like yeah I told her not everyone wants to suffer like you or me and have kids at 19. And I’m so confused because like wth it rlly freaks me out and weirdos me out that my bfs mom is talking about that stuff. On top of it she was saying to my bfs mom (her daughter) how she needs to call me and have me watch over the kids which I rlly don’t appreciate seeing I have my own life and job and hobbies I want to do and I didn’t decide to have kids there not mine. please give me some advice don’t hold back, I don’t think I’m being selfish about not watching over someone else’s kids but please let me know what you think!
My boyfriends mom?
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