You walk onto Remus's dorm as you two shared one. What you didn't expect was to see Remus and Sirius together. You stop as you open the door to look at what you'd walked in on. Remus was lying on the bed with Sirius straddling his lap. You look between them and neither see to see you. After some time, Remus notices you and smirks.

"Hey, wanna join, or are you just going to watch?" Remus's smirk only seems to grow and Sirius looks back at you, waiting for you response.