They didn't really say anything about the dad did he like ditch her because of prostitution?(fuq her tho if you cannot support your own kid just don't even get one just for the sake of it)
I'm pretty sure abortion takes money and she doesn't have that. So her husband probably divorced her and took everything or she just wanted to feel the happiness of having a child with him but ended up splitting for some reason. Not everyone is open to abortion so it could've been illegal where she is.
I have never heard that you have to pay to put your kid in an orphanage so idk but she could be a dick and leave him at the door, I honestly don't think she loves him all i could see is just a mother that just manipulate tf outta her kid, i mean you could see that even he can't really be comfortable with he is with her, I personally would be ashamed if my kid can't even relax when hes with me, I wouldn't even consider getting a kid if I don't have a job instead of doing prostitution because it would effect him too
Eru is best girl:(