I've never taken my wife to a strip joint because the situation has never been just right, nor have I seen her with another woman, live, right there in front of me. I have, however, seen her with another woman on video!
There was a time, before I knew her, that she and an ex were into swinging. Often, her ex and/or the other guy involved would take photos and video of the event. When my wife and I first got together, she gave me a whole collection of pics and vids that she'd taken with her when she and her ex split.
On one of those tapes is a scene, about 15 minutes long, of my wife and another woman attacking each other. She insists that they only did it for the guys benefit as you can clearly see her ex walking around the hotel room, nude, taking pics from different angles (or taking part, getting his dick sucked or jerked by hand) while the other husband moves around, getting various video angles as the girls went at it the middle of the bed.
Regardless of who's benefit it was for, my wife certainly seemed to enjoy it as they went down, spreading each other's pussy and sucking lips and clits! My wife says she's not bi or even interested in other women, but she seems to disprove that theory in the video! During that scene, if she is not sucking on nipples and playing with breasts, she is sucking on the other girl's clit or has her tongue buried deep in her vagina! (I do agree with her that on the video, she seems much happier "receiving" the other woman's attentions rather than "giving" her own. In fact, she seemed to really enjoy just laying back, playing with her own breasts and pinching her nipples as the other woman eats and fingers her pussy until she comes hard all over her face.)
It sure was an eye opener for me to see the first time and hot as hell every time I've watched it since!