I know she had an affair with him...

When the pregnant lady, who is married, is at work, some days she sometimes flirts with David by touching him, but most times he looks for her and talks to her when no one is around.

I asked her one day if she has a husband and she said "umm well I have a fiancé. Why?" I said "nothing". Girl, I know you and him had an affair... you or him can deny it as much as you want but I KNOW!

They are both married with kids.

This bothers me because 1) She is liked by everyone for some reason, and 2) I slept with him before and I don't want her messing with him anymore... even though he isn't both of ours.