Friends with benefits

Okay so let’s say you’re single and you’re talking to this guy who is also single. So the guy is single but is on & off with his baby momma, keep that in mind... Anyways you & the single guy decide y’all want to start a friends with benefits relationship but yall keep it on the low, so no one knows... let’s say y’all messed around a few times already & one day y’all meet up to do your guys business but you see that he has hickeys on his neck... how would that make you feel? & are you even allowed to have any feelings about him having hickeys cause y’all were nothing but friends with benefits... Also those hickies were from his “ex”/babymomma & all of a sudden him & his baby momma are back together... does that make you a side chick? Or not because when y’all were fulling around you didn’t know he got back with his ex/babymomma..??