I assume this is fairly niche but I might as well try and get the ball rolling here. It could start off as a regular wife swap and may even turn into a foursome, but at some point (preferably at the end) one of the husbands has a threesome with the other couple while his wife is either completely oblivious or is fully aware and watches on in devastation. I've already found a handful that pretty much fits this description, though some of them I feel never reach their full potential. For example,
UMD-765 Two guys plan a trip to the hot springs with their wives so they can swap and near the middle of the video there actually is an MFM threesome in the bath. There's a few videos in the same series that follow this sequence path but I consider this one to be the hottest.
GAS - 434 These two couples swap and near the end there's an MFM threesome while one of the wives watches from the other and gets emotional out of (what I assume is) jealousy.
If these are up your alley then enjoy and if you know any other videos with similar if not the exact same stories, then please recommend. (Additionally, if there's any type of video where a husband has a threesome with another couple under any kind of context, then I'll gladly take recommendations for that as well.)
UMD-765 Two guys plan a trip to the hot springs with their wives so they can swap and near the middle of the video there actually is an MFM threesome in the bath. There's a few videos in the same series that follow this sequence path but I consider this one to be the hottest.
GAS - 434 These two couples swap and near the end there's an MFM threesome while one of the wives watches from the other and gets emotional out of (what I assume is) jealousy.
If these are up your alley then enjoy and if you know any other videos with similar if not the exact same stories, then please recommend. (Additionally, if there's any type of video where a husband has a threesome with another couple under any kind of context, then I'll gladly take recommendations for that as well.)