Yeah..to me, sounds like the show staged it for the "dramatics", which is what brings in the ratings..
But on a realistic note....IF my parter informed me that he wanted a 3some (without my inclusion), and I allowed him, then that wouldn't necessarily be him cheating (as per my awareness and allowance).
I'd be good with his fantasy, so long as I was included...(even if indirectly). If that's what would satisfy him, sure..but, I'd expect the same in return..AND gets...(IF that were the case).
Shangrala