That was most certainly not a protest and he groaned at the sharp stab of pure lust caused by the feel of Regulus' frustrated movements. That lust and desire and emotion could be all tangled up was a heady revelation, freeing in a way he wouldn't have suspected even two hours ago.
Growling softly in the back of his throat, he tore his eyes away from that hypnotic gaze, fastening his mouth on Regulus' collar bone to nip and suck. His hands slipped around and down to cup the other man's arse and draw their hips tightly together, giving the other man a brief taste of what his actions said he wanted.
Then Remus was sliding down his lover's body, unhurried, but not slow. Lips, teeth, and tongue moved over Regulus' skin almost of their own will. Nipping here. Licking there. Suckling at this spot there. There was no purpose or direction save the need to taste and savour as much of Regulus' body as he could reach.
As he traced a teasing line along one hipbone with his tongue, warm brown eyes sought stormy grey once more, unwavering. Past curiosity not yet explored came flooding back and he let that new desire show through in the look he gave Regulus as he switched his attention to the opposite hip. Teasing. Questioning.