I don't think Link would seek revenge for that. =P Or if he did, it'd probably relate to food or something. I can't see him unleashing Lenalee on Allen... it'd be between those two. I can't see Kanda telling her, either (why?). One of them could slip up, but... I'm guessing it'll be revealed by accident somehow, maybe by Lenalee giving him a hug when he returns, and when Allen flinches... Then, of course, he might have to tell her.