My SIL always finds a way to humiliate me and treat me like shit

To

I am 30 weeks pregnant and my SIL took me to go get this bassinet for my baby as my car was at the mechanic. We get there, and the people were asking how far along i am and whats the gender etc.. making small talk. I am having a boy after 4 girls. Blended family my husband has 2 kids, i have 2 kids and we are having our third. 7 kids all up and im getting my tubes tied. Its a big family but we have the money and time for them all, we do not rely on welfare payments (unlike her). hmm. So she turns around and says "I have 2, a boy and a girl, thats enough for me' and then glared at me and said "please tori dont have any more kids because you have too many as it is" then i was like silenting saying fuck you in my head. That wasnt enough though she said this lady "Omg she has like 5 kids of her own now plus my brothers 2 time to get the implanon" and started laughing in front of me. Then she said "Youd think by now she would know what causes it!!" and the lady obviously felt uncomfortable and im feeling like i had steam coming out of my ears. I got the bassinet (she had found it for me online) and now i immediately wanna sell it cause everytime i see it i think of her