Sally Takes Two Lovers (Companions Escort Service #3)
Brynna Blake

Rick and Jase have both known since an early age that they were bisexual. They have also been committed to each other for twelve years. Their complete devotion and trust for each other makes it possible for them to bring women into their bed upon occasion to spice up their sex life a little.
They think seducing Sally Grayson will be such an encounter, but Sally is no normal woman, and neither of them are prepared for the sparks that fly both in and out of the bedroom.