The dog 'went wee-wee' on the carpet. [=the dog urinated on the carpet]
She's 'a wee bit' late. [=a little bit late]
The doggie 'wee-weed' on the carpet.
(..) was a flower petal. As I watched, it sank. But just before it reached the bottom, it transformed into a wee fish. It was beautiful magic. Wondrous to behold. The flower petal had come from a lily. Your mother. (..)2009 Harry Potter and the Half-Blood Prince