Some lines are meant to be crossed. But this one could destroy everything.

At thirty, Wren Bennett is finally building her dream life. Her luxury interior design business is taking off, and she is landing career-defining projects. But her newest client is the one woman she has been secretly, desperately in love with for five years: her mother’s best friend.

Forty-six-year-old Celia Hart is starting over. Fresh out of a suffocating nineteen-year marriage, she buys a ruined lake house to reclaim her independence. She hires Wren to manage the renovation, expecting a strictly professional relationship. Instead, she finds herself trapped in a house with a confident, beautiful woman who sees right through her carefully constructed defenses.

Forced to work side-by-side in the sweltering summer heat, the simmering tension between them becomes impossible to ignore. A single, reckless kiss on the dock ignites a passionate, secret affair that breaks every rule. But Celia is terrified of the fallout—and losing her best friend—while Wren refuses to remain a hidden secret.

As the renovation nears completion, the walls they’ve built around their hearts begin to crumble. They must decide if their forbidden love is worth risking the only family they have left, or if some secrets are better left buried.

Her Mom's Best Friend is a steamy, high-angst sapphic romance featuring forced proximity, an age gap, and an explosive slow burn.