There's a reason why 'trooper FN-2187 is Captain Phasma's favorite soldier. Every few weeks or so Phasma is seen taking more interest in '87 than usual, because I guess she has it out for him? Well, at least by witness' speculation.

+ Events start out dub-con.
++ '87 is manipulated into it.
++ Eventually '87 begins to look forward to these 'sessions'.
+++ Bonus if '87 gets to be the dom sometimes.
+ Hux is suspicious but can't be certain.
++ Kylo Ren, however, is completely aware.