I being a woman, would have never let this happen. My husband is ALWAYS in the room, and always with in arms reach. And knowing my husband, you handled this nice compared to what my hub would have done. I think you did the right thing, I do not think that you knew what was going to happen, so you are not at fault, the other guy is. But not all single men are that way. We have been with two couples, and 3 singles, I have much more fun with singles, I have BOTH guys totally interested in me, and I like it. And none of them have tried anything. So just think about it, but just don't leave her alone again, that would be my advice.