Remus choked on a breath and whimpered when his cock was trapped in a tight clenching vice. He'd been so enraptured by watching Severus he'd for a few moments forgotten everything else. His body reminded him though, drowning him in sensations as he kept moving into Severus, kept stroking him through his orgasm, moaning and shuddering with pleasure.
Then he was pulled close, not even a hair fitting between their sweaty bodies as Remus' thrusts and breaths became erratic and his thoughts disjointed. It was almost too good, too intense, too much, having and feeling Severus like this, hearing him say Remus' name with such passion, kissing and biting him...
The sharp sensation shot through Remus, sending blinding pleasure straight from his neck to his balls and he cried out when the strong tension inside him suddenly just snapped and he came. It felt like he was releasing his entire being into Severus, pulling all strength out of his muscles for a few moments. Remus groaned against Severus' neck, leaning hard against his lover and thus the wall as he slowly, somewhat reluctantly recovered. He wanted to keep feeling this, didn't want to move out of this situation.