We really enjoy the hotwife dare/challenge thing, it is pretty frequently incorporated into our play.
The ‘slut wife’ walk at Vegas or Tahoe resort hotels is a favorite; having KK take a stroll from our suite to the elevator lobby either nude, or in one of her fuck-me outfits is always a thrill.
Fucking, or showing off in front of an open motel or hotel room window, or on the balcony is fun too. Hotel/motel rooms are always a turn-on, because you can do things like have her masturbate with the suite door propped open, dare her to do a hot blowjob in view of the hallway, or get fucked with the door propped to expose the show.
Sex in risky, public or semi-public venues is good for a thrill as well. We’ve taken partners to places like public parks, and had KK fucked on a picnic table in the great outdoors.
Adult theaters are fun too - daring her to touch the nearest cock, or get finger-banged while being watched are hot distractions, and they appeal to KK’s show-off nature.
Daring KK to find a strange cock to suck and fuck in a dive bar is another thing that we’ve done - she’ll find her prey, and end up having sexy time in a restroom, or out in the parking lot in his car, or our car.