[Diarmuid gives her tail one more gentle pull and then lets it go so he can stroke her back with a few fingers.]

Look at it this way, if he underestimates you and laughs like that, while he is distracted you have the perfect chance to jump on him and take your revenge. Tickle him with your tail! Lick him! Climb on his head. There are so many ways to make him sorry for laughing...

[Because, Diarmuid can see him laughing, so it is only proper that he helps his little girl plan her revenge.]