What should I do about my wife getting hit on by the new neighbor? The wife!!!?

Our new neighbors moved in at the beginning of the summer and we have just really got to know them the last few weeks...anyway we've had them over for grill outs/pool parties and the booze was flowing. Anyway I kept noticing that I thought the neighbor, the woman, (Meagan is her name) kind of had eyes for my wife...it just seemed she was looking at her like a piece of meat (being a guy I know that look...duh!), well as the weeks have gone by her and my wife have really been spending a lot of time together and just how they interact it kinda left me with a feeling that something was going on between them. So this past weekend I am mowing the lawn and talking to the husband and he says have you noticed how much time the girls have been spending together? I said yeah I have. He says well just so you know Meagan really likes Lori (that's my wife)...I said yeah I could tell. He says no I don't think you understand, my wife is Bi and she REALLY likes Lori. I guess he was trying to figure out my reaction so he could let his wife know...that's how I read things anyway. I didn't know what to say, all I got out was well Lori is a cutey and meagan is too so I can see how they might be attracted to each other...not sure where that wisdom came from but that's what I said. I haven't said a peep all week, just thinking of what to say. My wife never told me she was attracted to girls and as far as I know she's never been with one (well that she's told me about), but I have always kinda thought she may have some tendencies in the right situation...but i never expected anything to happen....Soooo, what should I do??