Beyond Addiction by Desiree Holt

When Fallon Crowe discovered her submissive side, she indulged it fully, reveling in her erotic nature—until she stepped into the brutally possessive world of Brian Willoughby. More than a year after she was literally dragged away from his abusive clutches, Fallon is finally building a new life with Cord Jamieson, a Dom who reminds her that punishment can be loving, pain an aphrodisiac.
But when Fallon unexpectedly runs into Brian, he reawakens an addiction that never quite died. Now she’s torn between the caring relationship she’s established with Cord, and Brian’s darkly mesmerizing lifestyle that goes beyond safe, sane and consensual.

The choice is Fallon’s—the wrong one might destroy her completely.