Borderline

(Suncoast Society 57, MM, MMM, MF, BDSM, HEA)
Bob discovered the joys of serving a dominant woman in college. Later, he felt adrift and alone, until he started seeing Mistress Cardinal. For three years, he faithfully followed her rules, secretly in love with her, thinking he’d never be more than her client.
Until the day he realized he was more, and Tilly opened a little of her heart to him. Happiness had literally been within his grasp, until Tilly’s ex, Cris, and his Master, Landry, entered her life and swept her away. Despite the pain, Bob still loved her, and jumped at any chance to play or serve her. Even submitting to Landry, the man who became her husband.
But what happens when a tricky sadist has a sneaky plan of his own? What happens when Bob has a chance to cross that borderline from plaything to pet? Can he accept Landry’s terms, or will he have to walk away from the only woman he’s ever really loved?