“But isn’t that what children are for?”

To give context, I talked to my mom the other day and I was discussing something from class the other day. I’m a PhD student in counseling psychology and I was telling my mom (didn’t include client details don’t worry) about a girl who’s mother had her only so she could be a slave, pretty much all the girl was meant to do was to do chores and take care of her when she gets sick. My mom then replies “but isn’t that what children are for?” This woman abused me for years and has said some vile shit but in that moment, I felt absolutely disgusted with her.