Molly smirks as she hears that noise. She carefully pulls down the zip on his trousers and is surprised to find he's not wearing pants.

"Sherlock Holmes..." she says to start to tease him about it as she slides her hand between the parted fabric and palms his erection. His name is as far as she gets though before his own hand is sliding through her wetness and the thought is cut off by a whine.