<human>: To start, this has only been going on for about a week or two now so there is nothing serious happening yet. Initially I told her I wasn't interested in a relationship at the moment but I have to say I'm rather surprised by this girl, and I definitely am developing feelings for her despite the fact that we're supposed to be FWB's. She knows this and I know she's getting feels as well. It's obviously still very early on with anything between us so I want to ask this now before anything develops and someone gets hurt.

She still lives with her ex and we really haven't talked much about this so I don't have a lot of details about the situation. I do know she and him do NOT get along.... like at all. He also really hates my face and she and I have done everything possible to avoid me bumping into him when I am there. He isn't violent or anything, just very immature. So that's the level of detail I have about this situation.

I do know she wants him to move out and has started interviewing possible sublets. Nothing seems to be happening on his end with moving out, on the other hand I really don't care to ask her about his day to day activities. 

Should I ask her more about this all and see if I'm comfortable with it? Or should I just take this as a huge red flag and bail now? Other than this odd situation she is a pretty awesome person.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: I think I might like my FWB but she does live with her immature ex who *might* be moving out soonish, what should I do?