A young lady wakes up to a wet bed. She has a shower and gets ready for university and leaves in a hurry without changing the sheets on her wet bed.
Her older sister walks in to the bedroom to discover the wet bed, thinking her young sister spilt water, but after a closer look and smell, discovers the bed is covered in pee, so she changes the sheets.
She also discreetly places a diaper on the clean bed as a subtle message. Meanwhile at university, the young lady wets her panty.