While my friend is lying drunk in the room, I fuck his young girlfriend

But I wonder - is a blowjob cheating or nothing like that? If a drunk boyfriend is in the next room, and his girlfriend seduces his friend into a blowjob - is that cheating or nothing like that? And with this young girl, such a situation occurs, but after sex, by and large, no one cares. Well, she gave it a couple of times, then took it... in general, these are working moments and in general, everything is pleasant and good...