Maybe probably dub consent since they’re drunk but

Male WOL and Thancred head out to drink together then eventually Thancred takes them home to 👌👈 FUCK

Male WOL is gay. Lyse is a lesbian. They’re both grieving Papalymo, at least a little drunk, and decide to shag. It is the absolute worst sex either of them has had in their lives.

Feel free to write the terrible sex, the aftermath, or both! I would prefer the story ends with them still friends and (eventually) able to laugh about it, but so long as the bad idea is mutual (no noncon/dubcon), go where your muse takes you!