Babysitting My Naughty Sister by Jamie Aisher
Series: Black Book Fantasies, Book 2.
Approx. 2,860 words.
Published on September 4, 2012.
After being asked by his parents to house-sit and look after his little sister, he accidentally sees her naked. This awakens in him a new, forbidden desire. Later that night, after relaxing with drinks and a DVD together, his little sister notices his bulging pants… and to his surprise… she asks to see it.