What if a virus stopped sexual development of infected girls in its tracks at age 10 or 11. They continued to develop physically, but without changes wrought by puberty. Suppose you were one of the infected girls at age 15? Suppose you had a brother that loved you enough to let you explore your stunted sexual awareness through, and with him. Suppose the act of exploration triggered what everyone assumed you couldn't experience: sexual arousal? What if it cured you?
A father hears his daughter fooling around with a guy just as he steps out of the shower. He decides he needs to take immediate action, but maybe he needed more than a towel on before entering the room of his teen-age daughter.
A story of mis-understanding? Janice (Janie) and Jack have been married for a while. He asks for her to do something different then their usual missionary evening of sex. Their son Jeff, overhears a loud argument between the two, and decides to get involved. (codes will be added as necessary)
Tori discovered her brother spying on the neighbor girl. He said it was because he liked tits. She wanted to find out what he found so fascinating about tits. The only way to research it was to give her brother a few peeks of her own.