"my friend wants to get back to her abused bf"

my friend tells me everyday about her boyfriend and girlfriend problems cuz he ex bf used to beat her and strangled her and her girlfriend because shes bi talks to her and then doesnt and they fight and argue. she told me the other day she slept with him and that it brokee and she doesnt know if shes preg and she got an sti from him befor. then she went out tonight to sleep over somewhere and there is the only where she would sleep and she wants to get back with him after he abused and beat her and strangled her.