[Advice] Daughter (19) wants to move in with my wife & I after finding out something about her stepdad

I have two kids from previous marriage, daughter-19 & son-15. I recently received a text from my daughter that she found out her stepdad has propositioned a couple of her friends to meet him somewhere with sexual intent. She now doesn't want to be around him any more than she has to. Obviously I said she can stay with us, no way I'm going to make her stay in a place she doesn't feel safe.I have my kids every weekend (fri-sun), and they both have their own rooms. I also have a toddler with my current wife, and we're expecting another next month. Full house to say the least.Back story of my previous marriage and why we broke up. She was cheating on me with the guy (now married to) for over a year. This was a decade ago. I walked in on them, and that was pretty much that. Now, I'm trying to make sure that I don't allow my negative feelings towards the two of them to make me biased as to what my daughter needs. I want to have her know and feel that she's safe here. That I don't influence her to do something I feel is the way to go, but that she chooses her own path. I know that's the best thing for her, but how do I make sure that I'm not projecting myself as a possible vengeful ex? via /r/Parenting http://ift.tt/2pq2FG6