SIL IS PUMPING WHILE PREGNANT

Okay glow mommies my sil is about 36 weeks pregnant and she just has tried everything to get this baby out she says “I hate being pregnant I’m tired” she’s drank castor oil and it had no effect on her and when she came over today she pulled out her breast pump and just was pumping each breast for 30 minutes I told her that it is not safe whatsoever and that baby isn’t ready to come out don’t force it but she said pumping won’t hurt her baby.... or put her into labor... I’m pretty sure she is wrong. Can I get some comments and points of views so I can show her or am I being over reactive?

**** my brother is 20 and ended up getting her pregnant she’s 18. He then asked her to marry him and she said yes. They got married. I’ve tried talking to my brother about her because she has always made these comments saying how she hates being pregnant (even though there is nothing wrong with her pregnancy) I explained to her castor oil doesn’t do anything and it will put your baby in distress she called me a bitch and walked out. Then came back 2 weeks later which makes her 36 weeks today. And started to pump. I texted my brother and said she’s putting their baby in danger and she really shouldn’t be even having a kid the way she’s acting. Not to mention me and her have always had our differences she’s a total bitch and uses my brother and cheats on him. She’s just flat out stupid. She made a comment once about my kid crying ( he fell) and she said that she would just give him Benadryl. Like what??? She’s the most idiotic person I’ve ever met