Yeah, thing is it seems like she does it just for doing it.
Maybe she liked old dudes, maybe she likes the sex but not the commitment and wants to make a wall by selling her body instead of giving it for free.
I fully expected her to refuse and start anew, but nope, she will continue to live her lfie as she always did, a weird whore, doesn't need the money, knows she could get with a good guy if she wanted but sells herself seemengly randomly.