You are kind of being a jerk to be honest.Well, what does your experience say exactly? What more could have been done? Not to be a jerk, but this is a bit of a pet peeve me of mine: Either elaborate or don't say anything at all. To simply suggest you know more things, is useless in furthering a conversation.
With financial, emotional, education, and systematic support, I've seen domestic workers who were in very similar situations, including the abuse and working with these families since they were barely teenagers, become independent. It starts with investing in their education, making sure they have enough money to be financially independent if they ever decide they want to leave, and teaching them how to commute in a city without a car or driving (and helping out with transport until then).
In this situation, it sounds like it would also start with giving her the choice to move out from the mother's house. (I can't say if she would take it but that's not the point.) There isn't any mention of the siblings even trying to do something like this until the mother's death. Hell, even the situation with the teeth, the author couldn't ask Lola if she wanted to go herself and he would take her? Letting the mother control everything and treat Lola like property was not inevitable even if it was normalized.
Greatest sexual/romantic relationship? Yes. In many situations, the domestic workers I know had never had anything beyond that (or even including that) until they were given the support to stop working the family that they moved over with.Was the extent of their greatest relationship being some guy you thought was cute, handed your shovel back?
They stole everything away from her. Everything, she was abused and sold into believing this was her family.