Come Back Mister Puns

He's 4 years old and walked into the kitchen while I was at my aunt and uncle's house. My aunt saw him and got slightly irritated because this was a problem she thought he had gotten over. She goes to talk to her husband about it:

Aunt: Keegan had another accident honey.

Uncle: Oh did he now?

Aunt: Yes. And I'm making dinner, so can you please deal with this? (at this point she is still pretty ticked off)

Uncle: oh I'll deal with it. Keegan come here.

Keegan walks over

Uncle: Urine a lot of trouble mister. Can't you pee that you're pissing your mother off?

My uncle proceeded to laugh uncontrollably at his own joke while my four year old cousin stood there looking really confused and my aunt walked away with her arms crossed, angrily trying to hold back her laughter.