Fiance and my best friend

So starting to think my fiance might think about my best friend sexually... we were all hanging out friday and he had two friends over and i had just her over and they were talking non stop and sex came up as well... night ended and whatever no big deal... he went to watch the football game on sunday with a buddy and last night he told me that him and his friend logan ( logan and my feiend hate eachother and he wasnt there the night we hung out) were talking and he found out that his friend would totally hook up with her... but it making me worry because how would having sex with her even come up in a conversation unless my fiance brought it up. My fiance and i are the only ones that know about her health issues she is having and we are the only ones that know she has a shallow vagina... he brought that up when he told me his friend would fuck up but she better do some dome if she pulls the shallow vagina shit... would you be pissed and worried or just let it go? Like it makes me wonder if he was the one that brought it up and was talking about it.. as if he would hook up with her.