Yea, I deserve to know. Sorry if I don't have some long paragraph answer for you Giga but I just simply think the person has a right to know. How they feel about it is not the topic of the thread I think. I am with out a doubt sure that they should know, I think it is actually kind of disturbing to think that I would be hanging out with my friend and girlfriend who they both had a night together, and yet not knowing about it at all...yea that just makes my stomache queezy.
Actually I Think dating any of my friends ex girlfriends is a no no. I dont care how long they have not been together or how well we fit together.