It is a cool and breezy night. 1am. Mom hears cat-sneezing while working downstairs with ALL kitties presumably out of the house since 2 hrs ago. Then scratching and snoring. Almost freaks out that she's left a cat indoors for the night, which is forbidden by housemates.

Starts walking around the house checking for hidden cats, then sees an open window in... the dining room, and the 3 usual suspects sprawled right outside the window.

Julio it seems had gathered the troops to lie in wait for Peter with him in his strategic spot , and when the wait was too long, the troops started grooming themselves, scratching, snoring, etc.