kinda sounds like Postnatal depression and some other things. I also think she could have been traumatised by the idea of a child subconsciously because all of the worst points of her life happened when she was preggo. By no means are the things she does later ok but i can 100000% see why it...
so let me get this right, her friend gave her to a guy she doesnt really know that well (What other people see) when she was off her shit drunk, alone, to be taken home. Sounds kinda sus