For Pleasure and Pain by Zoe Asher

Elizabeth continues her transformation into Damon’s lifestyle, growing and embracing her desires while still hoping for something more than an arrangement.
Damon comes face-to-face with emotions he has buried for years, believing the only way he can survive is to maintain control.
A series of incidents finds them both beginning to deal with their emotions as they look for a middle ground. After casting Elizabeth aside, Damon realizes he may lose her and goes after her to bring her home. Pleasure is there for both, but the pain is emotional, with Damon trying to let go of some of the beliefs he has lived by, and Elizabeth believing everything will be all right, that she is happy for now, and that she and Damon will live together happily ever after.
But is that really how it will turn out?