Imatture housemate and her bf

My housemate is 21 and she's in a relationship with this guy (23) for a bit over a year now. They're super toxiv to each other with fights that she has admitted get physical. A month ago she got pregnant and they decided to abort it, after that they got into this huge fight to the point he ended up humiliating her on Facebook and calling her names and shit. She told me she was going to cut it off and end the relationship but 2 days later were all lovey-dobby. It makes me think they're immature, their fights get physical over the smallest things.Well the other day she texted me saying she thinks she's pregnant again, and while me and ger bf were there she took a pregnancy test and its positive, then she went to the hospital last night to get a blood test done and she found out that effectively she is indeed pregnant. She was in a crisis calling mr at midnight because she doesn't know what to do. She thought the hormones from her previous pregnancy was there and that's was delaying her pregnancy (like yeah sure hun) And now her boyfriend is insluting her and blaming her for getting pregnant.