Ask if you can come with Tanya and Sarah to see her diaper.

"Um..." you say. "If it's okay. I'd like to see."

"See me change Sarah?" Tanya asks.

"Well see her diaper." you say. "Just to understand better. I'll leave before she takes it off."

Tanya looks at Sarah.

"That's okay." Sarah confirms. "I don't want to have to hide my diapers from him any more."

You follow them to Sarah's room where Sarah lays on the bed. Tanya lifts Sarah's dress out of the way to reveal a puffy white diaper. The crotch is darkened. It is obviously very wet.

"I'll give you some privacy now." You say.

"No. It's alright." Sarah insists. "You can stay."

Tanya opens a drawer and takes out a clean diaper and a box of baby wipes. She places them next to Sarah on the bed and then untapes her diaper. The heavy diaper falls open, revealing Sarah's hairless pussy and her bottom resting on the yellowed padding of the diaper.

As you watch as Tanya cleans Sarah's crotch and bottom with the wipes, you feel your cock growing hard in your pants. neither of them seems to have any idea how erotic this is.

Tanya rolls up the old diaper and slides the clean one under he friend's bottom. She pulls the front up, hiding her privates, and fastens the tapes. After a quick check of the leg guards, Tanya helps Sarah off the bed. "I'll see you out there." She says, leaving you and Sarah alone.

"What are you thinking?" Sarah asks.