I [M] fucked my high school friend’s ex [F] while her college friends slept in the same bed

(This is my first time posting so I apologize if it’s rambling but would love feedback).

So Arnie and I were friends in high school. Not the closest of friends in our group. I never really hung out with his girlfriend Samantha one on one but always thought she was absolutely stunning. Anyway, Arnie and I’s friendship seemed destined to fade during college even though we were going to the same place. They were going to do long distance in college so even if I did see her, it would be to visit him.

As luck would have it, she went to college with my best friend Chris. By junior year, I finally made it out there to visit Chris and we were going to go on an adventure to do some acid in the woods at the cabin a friend of his had access to.