My 13 year old step daughter told me she wants to be a "sugar baby"

So I was talking to my 13 year old step daughter yesterday after work before my husband came home and somehow the conversation got brought up where she said she wants to be a sugar baby when she gets older. I told her that that is basically being an escort and/or leads to prostitution. I tried talking some sense into her and telling her all of the bad things that can come out of it such as being arrested or getting hurt by these men. She says that it's perfectly legal and an easy way to make money and that you can do it all online now.

I told her she needs to respect herself and her body, but she doesn't seem to care or get it. I told her she's too young to be thinking about that kind of stuff and that she should be focusing on school and what she wants to do when she grows up that is a career and what college she wants to go to not being a sugar baby.

I just recently started gaining her trust for her to be able to tell me these kinds of things so I don't really know how to handle this information. I haven't told my husband yet or her mom but honestly I don't think that they're going to do anything about it and I will just lose her trust by telling them. She doesn't have any parental controls on her phone and that is all up to her mom even though we pay the phone bill but her mom has 100% custody of both of his daughters we just get visitation on the weekends. He kind of just lets her make all of the parenting decisions and likes it that way.

Luckily she is going to start therapy soon so I told her this is something that she needs to bring up to her therapist. I don't really know any other way to handle it. What would you guys do if you were in my position?