Sending more hugs and prayers for strength for you.
There was a brief period of time when my difficult child did something similar. She would dress sexy and go clean guys' apartments. She told me she was cleaning houses to earn money, but I caught her leaving one day dressed as a streetwalker and confronted her. She initially denied it but later, after a couple of glasses of wine acknowledged what she was doing (there is more involved but I don't want to put it here). Later still, as in a YEAR later, she confided in me that she also had sex with these guys (they were once her classmates in elementary/middle/high school, ugh). I know how you feel about wanting to just vomit. Thankfully, this was a very short career stint for my difficult child - I hope you can say the same one day.
Blessings to you and yours, you are doing the right thing by protecting the rest of your family. Now protect yourself and don't accept her calls, etc., until you can be certain she's growing.