Despite the inappropriateness of it, Severus snorted. "As long as you promise to never call me that again, brat."
Leaning down, he pressed their lips together as he withdrew. Another slow thrust and he was buried inside his lover's body. It felt nothing like he thought it would-- that is to say, it was better than anything he'd imagined during those long showers when he'd fucked his hand and bit down on his knuckles to keep himself from groaning-- but he wished he could do something to help Regulus along as well.
Sliding a hand in between their bodies, Severus wrapped his fingers around his partner's cock, giving it a gentle squeeze. Regulus was still hard, so he pulled away from the kiss to lick his palm before working his lover's prick with slow, languid strokes.