Poster, better wake up and smell the coffee. She is only using you as a back up. Her suppose X is still top on her priority. Proximity brings familiarity. There is no how they will be sleeping together under same roof and won't still have that connection. The truth is you don't have a case here bro! Duh!

@op,first off,this is not about trust or whatsoever,this is disrespect in the highest order,I mean,I wonder what she sees you as to even tell you she aint gat nothing to do with him and you should trust her.its only her counterparts(female) that will tell you something contrary to all what you read in here(yea that's how selfish they are,always want to eat their cake and still have it),I mean,read all the posts here(telling you to wake the fucck up)........

My advice will be to tell her off now or get heart broken@the end(cuz that's what's gon happen eventually),be a man,be wise!.....