He's twice her age. Her father's best friend. And the only man who's ever made her feel like this.

Sophie never expected her quiet summer to turn upside down the moment she turned eighteen. She definitely never expected him - Gavin Carter, her dad's best friend, the guy who's been next door her entire life, the one she's called "Uncle Gavin" since she was in pigtails - to suddenly look at her like she wasn't a kid anymore. Like he'd been trying not to notice for longer than either of them wants to admit.

With salt-and-pepper hair, rough hands, and eyes that seem to see straight through every wall she puts up, Gavin is the one man in her entire world she's supposed to stay far, far away from. He's older. He's off-limits in every possible way a person can be off-limits. He's untouchable - and every single reason that's true only seems to make her want him more.

But temptation doesn't care about rules. It lives in every lingering glance across a backyard barbecue, every accidental brush of hands that lasts one second too long, every moment they both pretend not to notice the tension crackling between them behind closed doors when no one else is around to see it. One stolen moment - quiet, reckless, impossible to take back - becomes a secret neither of them can resist a second time. And once that line gets crossed, there's no pretending it didn't happen. There's no going back to "Uncle Gavin." There's only this - dangerous, forbidden, and impossible to stop now that it's started.

Losing It to My Dad's Best Friend is a short, sizzling age-gap romance packed with forbidden heat, secret tension, and a possessive older man who knows exactly what he wants - and won't stop until she's his.