Author's Summary: Luke is curious, Sarah Jane is embarrassed, Jack is Jack.
Characters/Pairings: Luke Smith, Sarah Jane Smith, Jack Harkness
Recced because: It's hilarious, cleverly written, surprisingly sweet on Luke's part and hideously embarrassing for Sarah Jane (and for Jack, except he's unembarrassable, apparently), and supports my theory that Jack has a giant fanboy crush on Sarah Jane. Besides, every kid has to catch his parent in flagrente delicto at some point. Luke being Luke...
Luke skidded to a halt, lowering the cricket bat as he tried to make sense of the scene before him. His mother was staring at him in horror and disbelief, her face turning a rather odd shade of crimson in the light of her bedside lamp. The same rather odd shade of crimson as the rest of her, in fact — he hadn't realised it was possible to blush all over. "Mum? I heard a noise and I thought...."
"I —" His mother swallowed hard and looked down at the extremely naked man whose hips she was straddling. "It's nothing to worry about, Luke, I was just, ah...."