eddie accidentally observing buck/tommy, maybe in eddie's (now buck's) place? forgotten ring camera or whatever? (maybe season 8ish? buck and tommy still broken up but still fucking? and gets to witness the daddy kink in action.
optional: eddie being eddie maybe he realizes that while buck is getting off on it, he maybe isn't really happy about that fact.
buck/tommy daddy kink + eddie POV
optional: eddie being eddie maybe he realizes that while buck is getting off on it, he maybe isn't really happy about that fact.