Apologise and close the door.

"I...Um." you stammer. "Sorry." You shut the door and return to the living room.

Soon, Tanya emerges but Sarah doesn't follow.

"You should have knocked. She's very embarrassed." Tanya tells you off. "Now she doesn't want to go out tonight."

"I didn't know she wore diapers." you say.

"So that justifies you barging into her room?" She demands.

"No. I shouldn't have done that. I'm sorry." you say. "Can I go talk to her?"

She shakes her head "She doesn't want to see you right now."