Andrew turned to his side and curled back up (and if he'd done it so that he was facing Jack, well, that was just coincidence) before nuzzling into his own elbow and making a little grumbly moan of sleepiness.
He peeked a sceptical eye at Jack in time to see that the strange movements were Jack's hand questing under the covers but not fast enough to avoid the tickling. He squealed and tried to get away from the evil fingers, but Jack knew all the places where just a couple of digging fingers would have him helpless and unable to move because of the tickling.
"I don't, you're a monster, you're-" he couldn't continue, laughter stealing his breath until he cried.