our regular bull turned out to be bi mid-play and now were all rethinking things

so weve had the same bull for nearly a year, lovely bloke, classic hotwife dynamic, me watching, him with my wife, all the usual. last weekend at our place he and i were both on the bed with her and she put her hand on his back and gestured between us and just said "go on then" and we did. and reader... i was not expecting any of that to feel like anything for me but it really did. and afterwards he was like "yeah i figured id mention im bi i just never know when to bring it up in a hotwife context cause people assume its all about the wife". my wife is THRILLED, she says shes been quietly hoping for years. and im sitting here at 41 having never thought of myself as anything but straight and going... huh. is this just a one off ENM novelty thing or am i about to have a whole journey i wasnt scheduled for