Pixie Dust’s sister Lightning Dust is a pornstar now. They don’t talk about that much. But he meets her hot friends sometimes, and then usually ends up finding them online later. One day, though, one of those hot friends -- Firefly -- catches him watching a video of her and Lightning Dust together...

Cover image adapted from 341789 (artist unknown) and 1274848 (by bbmbbf) on derpibooru.
Contains: incest, loss of virginity, casual sex, impregnation teasing, and a bit of porn logic