Potty outside?

This evening we are playing in the back yard and Weston says "I want to go potty outside". Daddy said "No, Weston. Go inside and go potty." I'm thinking to myself, "Weston has never asked that before .... What happened?.... Mike took Weston to the park today... "

Me: MIKE! YOU DIDN'T!!!

Mike: (on the defense) We had just arrived at the park and he tells me he has to go potty! There was no one around...

Me: UUUUUUUUUUUGH!!!!!