There is no real way to know whether she will leave or not. My situation is kinda the same. I have been with a married man whom I have known the last five years and five months ago we got intimate and he said he was going to leave his wife....of eleven years...ya right....well she shoudl be moving out this weekend....i never thought it would happen but it did and i am so glad i didn't give up........

some people dont leave though......not every story is happy........this is one of those situations no one hardly wins in........check out my thread the married man and I please help....about everyone told me to stay away.......

if anything pressure her and stop until she leaves or doesnt that is the only real way you know she is for real.

Of course it is hard leaving a relationship of so many years, one develops routine hard to just drop.....best of luck no matter what........