Lillian McDermott can't complain about the years she's spent at the top of a career she never wanted. But modelling gave her everything. Amazing experiences and enough money to leave it all behind to start her own perfume and fashion label. The one thing it didn't give her is Mackenzie Harris. Her brother's best friend. The man who sees her only as a surrogate little sister. Now, at the launch party for her the next phase of her life, she's done waiting. She's going to rock Mac's world until ignoring her is the last thing on his mind. Mac isn't blind to Lilli's charms, and he never has been. But no best mate screws around with a little sister, no matter how tempting. No matter how much he wants to show her exactly how he'd like to respond to her teasing. But this time she's gone too far, and he's not backing down. She started it, and he's going to finish it. One spin of the bottle turns friends to lovers. But as the boundaries come down, everything changes. Including what they thought they believed about the other.