The sister in law

has your wife ever been the SIL that got fucked?
While it is possible, I've no certain knowledge of it.

I have a middle brother, close in age, where we're often mistaken as twins. KK's had a fantasy since we've started dating, centering on being in an MFM threesome with the two of us. He's seen us fucking at least twice I know of, once barging in on us during our dating years, when we thought we had the house to ourselves, a second time in between semesters at college, similar circumstances.

We've done the pillow-talk / role-play thing on the topic dozens of times - she gets off to a smashing orgasm every single time.

All that said, I don't know that she's ever fucked him, and to the best of my knowledge he's never made an advance on her - certainly not one I've witnessed.