Sean Franklin knows a threat when he sees one. And despite her cute outfits and playful attitude, Dr. Gabrielle Knox is a threat to Club Apocalypse.He’s sure of it.At least, he’s pretty sure. Until he finds her indulging her Little side outside of the club. Maybe it isn’t just an act, after all. And when he finally gets Gabby over his knee, he’s forced to admit there’s no faking the way her body responds to his discipline.But their already shaky bond takes a hit when the club’s computer systems come under attack, and Sean is torn between protecting his business or being the Daddy his babygirl so desperately needs.