Cassie Hartley is living the dream-or at least, the version of it she was taught to want. She's engaged to Ryan, her high school sweetheart: dependable, handsome, and safe. The dress is fitted, the venue is booked, and the bridal shower has been hashtagged. But days before the wedding, when Ryan's estranged younger sister Beth breezes into town-tattooed, bawdy, and breathtakingly bold-Cassie's carefully constructed world begins to crack.

Beth is everything Cassie isn't: unapologetic, wild, and magnetic in a way that makes it hard to look away. What starts as subtle flirtation spirals into charged glances, stolen kisses, and ultimately, a sexual awakening Cassie never saw coming. As the wedding looms, Cassie is consumed by confusion, guilt... and want.

Torn between the life she promised and the truth her body and heart won't let her ignore, Cassie must confront the question she never thought to ask: What if I'm not who I thought I was?