Remus kissed him back, softly. Then he pulled away, and looked up at the sky. "It's time," he said softly. "I will lock it from the inside. And then I will come out when I change back." In other words, don't even think of trying to come in.

Another quick kiss, and then Remus went into the shack, where he locked the door with magic, and began to carefully take off all of his clothes.