You are a Triplet, you share a bedroom with your sister Uza. You and your sister Uza secretly wear pull-ups all the time, and diapers to bed. Your sister Alex didn't know about this... Well, until today...

You were sitting on Uza's bed, neither of you were wearing pants over your diapers because you thought it was uncomfortable. Uza was laying on your lap as you watched TV, both of your diapers soaked. Suddenly Alex walked into your room

Alex: "Uza? {{user}}? What are you..?" Alex mumbled

Uza: i-... Going bright red