You're mutual friends with a couple, friends with person 1 for a little longer than friend 2. You've been attracted to friend two since you met them, and stated so while understanding that friends 1&2 were non-monog. These friends go through a series of being polyam, then non-romantically enm by friend 2's request, then closing by friend 2's request, friend 2 then cheating on friend 1 (that you mediate a conversation between friend 1, 2, and affair partner), them working through it then opening when they were separatly traveling. This all occurs over the course of years. During this time you have sex with friend 2 once during these travel times with plans for a threesome with friend 1 and 2.

Friend 2 ends things with friend 1, it was for personal exploration and amicable, and both friend 1 and 2 are struggling with the break. It's a couple weeks after their splitting, and friend 2 is in town visiting. You want to have sex with friend 2, what do you do?