Boyfriends sister told their mom about my miscarriage

So back story I was 18 and I accidentally got pregnant we only told a couple friends that were our roommates but his sister also lived in the house so he told her too she lost her shit and was so mad and very rude and started I did it to trap him 🤦🏻‍♀️ I was on birth control when this happened and she knew that but whatever anyway after that the day after Mother’s Day I lost the baby and it was a whole thing I was as you could imagine upset and a month later after a missed period boom positive test this was a very emotional time for me I was again on birth control but ended up in the hospital and somehow got pregnant I had sex the day I went on antibiotics ( before them) and I guess that was enough and around 14 weeks we told my boyfriends parents and my boyfriend mentioned to his mom how he didn’t want the sister to know ( a lot more happened with her she decided she hated me now and said a lot of horrible stuff) and when she told her Awhile later the sister freaked out I guess and told her how I been pregnant multiple times and was trying to have a baby of course no mention on the measurements I took to avoid pregnancy or how it happened to his moms knowledge I got pregnant being stupid and now I feel like everyone thinks I did it on purpose 🤦🏻‍♀️ I don’t want her in my kids life or mine so far she’s never apologized or anything for what she’s said and so much more drama with her, what would you guys do ?