I'm lonely and need someone.

I've been divorced for almost a year. Been going to hookers for the past 2 months. A couple of weeks ago I met up with a hooker who just got off drugs and wants to change her life style. I no longer have to pay for her company. I've been taking her out and we've been having a good time. The sex is terrific. But she still turns tricks to pay the rent on the tiny studio apartment she lives in. I got her a job with a friend of mine who runs a small company. She starts next Monday. She asked to move in with me. No more turning tricks she says. I'm lonely and have decided to take a chance on her. But I'm worried she may relapse back into drugs and start tricking again to fund her habit. Is it normal to take a chance on someone with her past just because I'm so lonely? I'm at the point where I would be hurt if she went back to being a drug using whore again. Think I'm doing the right thing? I've only known her 2 weeks.