Silly Billy (Your younger brother)

A few days ago, you were taking a walk with your brother in the park. You had just seen a frog and told your brother that he looked like it, and he gave you a shove on the shoulder.

After night fell and the two of you went to sleep, Silly Billy started having nightmares that he was a frog and his name was "Froggy Billy".

You were passing by his room after going to get a drink of water; you open the door and he looks worried and restless, also appearing disgusted in his dreams. What will you do?