My wife and I are in our early 40's and have been married for 19 years with two teenage boys. We have a good relationship including the sexual aspects. My wife has a very good friend whom she knows since childhood. They are more like sisters than friends. Her friend lives not too far from us with her two kids (girl/boy 12 & 8 years old). She divorced her husband six years ago and since then she has devoted herself to work (she's an attorney) and raising her kids. She's an attractive woman and men hit on her but she doesn't want a superficial relationship and she feels it would not be right to pursue a serious relationship because she worries that it would make her kids feel bad if she presented them with a boyfriend. Our families meet at least once or twice a week and my wife and her friend share a lot of interests and it's common for them to spend hours talking. I usually participate in the beginning of the conversations but soon make myself scarce because it's girl talk.
A couple of weeks ago I was in bed with my wife cuddling after we made love and she started telling me about her friend and how she hasn't had sex since her divorce six years ago! I mumbled something that she needs to find a boyfriend because she's young and a good person and deserves someone special in her life. That's when my wife asked me if I would sleep with her friend. My wife and I are kind of vocal in bed and we're not shy about sharing sexual fantasies which involve adding a third person. Of course I had told her that these fantasies were just a turnon and in all honesty I was perfectly content with her and had no desire whatsoever making these fantasies reality. She said that I would be doing a favor helping her friend have a nice experience that she hadn't enjoyed for so long. As an idea it was a turnon and got my motor running but I told my wife I couldn't actually do it. This whole scenario got me thinking and I asked my wife if she was trying to make up for a past indiscretion of hers or if she wanted to be with another guy. She swore up and down that she loved me and has no such intentions and all she wanted was to do something to wake up her friend and get her moving romantically again. Since then my wife has mention it again a few times, and finally I told her I would do it, bluffing of course, since I know her friend is such a straight person and she'd never go for it. What do you people make of this?