Either Rey or Finn get infected with a virus that will kill the other. Rey is hit with something that the First Order engineered to target Finn ~or~ Finn is exposed to something that's deadly to Force users. They're okay with casual touch like holding hands or hugging but anything more intimate is strictly off limits. Terrible news since they're in a new relationship and want to get closer.
How do they have sex with their cute boyfriend/girlfriend? By having a Poe Dameron sandwich, of course!
+Poe feeling guilty that he's taking advantage of the situation. He loves them both but thinks that they're only having sex with him because they can't directly touch each other. ++ Finn and Rey feeling guilty that they're taking advantage of Poe. They're worried that once the effects wear off/ a cure is found, Poe will leave.
Finn/Poe/Rey - They can only have sex if they keep Poe in the middle.
How do they have sex with their cute boyfriend/girlfriend? By having a Poe Dameron sandwich, of course!
+Poe feeling guilty that he's taking advantage of the situation. He loves them both but thinks that they're only having sex with him because they can't directly touch each other.
++ Finn and Rey feeling guilty that they're taking advantage of Poe. They're worried that once the effects wear off/ a cure is found, Poe will leave.
Massive angst with a happy OT3 ending :)