watched my wife get soft-dommed by another man and the feeling afterwards was not what i expected... am i broken

ok this one's been in my head for a couple of weeks and i need to write it down somewhere. couple in our early forties, married 17 yrs, in the LS for about 5. weve done a lot — full swap, threesomes both ways, group play — and we thought we knew ourselves pretty well. my wife has always been the more openly kinky one of the two of us. shes a sub in the bedroom with me at home and we've done that dance for years. last month we met a couple at a play party near brighton. he's a confirmed dom (i don't mean lifestyle 24/7 i mean he knows what hes doing and his wife was his sub for the night by their explicit agreement). my wife and his wife clicked, the four of us clicked, and the suggestion came up that he would briefly play dom with my wife while i watched. nothing wild — verbal direction, a bit of light cuffing, telling her where to put her hands etc. everyone agreed enthusiastically. his wife was right there watching too. so the scene happens. about 15 mins. she safeworded nothing, she was clearly into it, he was respectful, his wife and i had a fine time on the sidelines. then we got in the car and i felt... weird. not jealous exactly. not angry. more like... displaced. like i'd watched a side of her that i thought was just for me being directed by someone else as easily as flicking a switch. by the time we got home i was actually a bit teary which has literally never happened to me in 5 yrs of LS. is this a thing... like is watching your sub partner be dommed by someone else a different beast than watching them have sex with someone else. and does the weird feeling fade or am i finding a hard limit i didnt know i had