It's a little weird how Ianto just knows that Jack stole those grapes. It's like a superpower or something. I love how Jack doesn't feel too guilty about taking them. That line at the end made me laugh.
Author's Response: Ianto has studied Jack extensively, he can tell when he's being lied to, lol! I think Jack doesn't bother feeling guilty over grapes, he reserves his feelings of guilt for bigger things. Thank you!