After Return of the Jedi whether its during celebration at the end of the movie or takes place some weeks/months after Luke reaches a point where things become too much and something triggers him and it's enough for him to send him into a break down. It starts out quiet and small at first but its not long before he's sobbing and uncontrollably with no end in sight. I would really like it to be Han and Leia comforting Luke and holding him with all of them involved but if anon wants to be just Han/Luke or platonic where Han and Leia are supporting him that's fine too.

Sex before or after is optional, if Luke's breakdown was brought on from all the emotions experienced during sex with Han and Leia(she can either just watch them or be apart of it depending on writer anon's feelings about incest) that's fine too.