His hand didn't make it in time to pull his shirt down. He was a little too distracted by the knee pressing against his crotch and the fact that Severus' hand was on his cheek. It stopped any sort of thought he had.

Lupin attempted a laugh, but it was weak and straggly. He dared not move so he just laid there and looked up at Severus. "Thanks?" He said as weakly as his laugh. He didn't know what to say, being in the middle of a head rush.

What was happening to him?