To say that he has no control over who conjures him up in their dreams is probably no excuse. Summoned or not, Ronan's own arousal is obvious to Kylo, who can read every obscene thought that Ronan has ever had about Murphy. He knows that Ronan was fully present in that fantasy, enjoying his softness and his tightness and his innocent fumbling. It's impossible to conceal that he'd considered materializing in Murphy's bed, the way he'd once done with Kylo, to play out the fantasy in his physical form.

The urgent press of Kylo's need, though, tells Ronan that his greatest sin here wasn't going to Murphy, but going to Murphy alone. He's promised all of himself to Kylo, to always be where Kylo needs him to be. In leaving Kylo to wake up alone, he's committed a betrayal.

The punishment may be well-deserved, but Ronan struggles against it, regardless. He can't help it. Kylo's hurting him, and only going to hurt him more, until he gets the satisfaction he's seeking - what he's forced to seek, since Ronan failed to tend to him.

It stops being a fight to escape and starts becoming a fight to accommodate in spite of Kylo's blind fury. Ronan spreads his legs before Kylo has to pry them apart, and he sinks his knees into the mattress for purchase, pushing himself into a better angle for the inevitable invasion. Adrenaline has him shaking.