Not Dating (слэш)

Steve brings Bucky back to the Tower post- CA:TWS and Bucky seems to be adjusting alright. Except he can’t relax, can’t sleep, and when he tries some self-relief (even when its imagining a certain mouthy genius with a butt that won't quit) nothing seems to work.
Tony understands Bucky's problem– after Afghanistan, it was months before he could relax enough to do that sort of thing, and when he realizes what's going on, he offers to lend a hand.
Bucky is suspicious at first, but Tony has (ahem) magic fingers, and what is originally a one time, fairly awkward moment between near strangers starts to happen more often until its not JUST a helping hand, because now it involves mouths and nakedness and then they are trading kisses and spending the night together and Tony is wearing Bucky’s clothes and stealing his pillows– but its not like they are DATING or anything.
They aren’t…dating, right?
Oh shit.
Are they dating??