You walk in on your wife and another female, WYD?

[SF HAWKEYE]

Depends on what they were doing... Scissoring yes of course dive in!
Unfortunately I've been around a lot of lesbians and they prefer other ways of pleasuring each other...

 

[HawkMachine]

I came extremely close to a threesome with two chicks, complete strangers (to me).

One was bi, the other was 100% lesbian and never been with a guy. They were a couple.

I talked them into it. It was basically a chance for the lesbian to experience a dude.

Went upstairs, got into a bedroom and the bi and I start making out. Soon the door swung open and people were like "Going to a different party!!!" and my fantasy came to a screeching halt.

Full disclosure, the bi chick was not attractive and a little bigger than what I would normally be attracted to. The lesbo was decent, but definitely not hot.