Loved this. Aaron finally got what he needed instead of what he thought he always wanted. These two play well off of each other. 
 The story is partially about the need to handle their relationship in private, both being in the closet for work and family, and partially about a murder/FBI investigation which Duncan is working on and Aaron gets sucked into. It's told from Duncan's 1st person POV. 
 It's fun, passionate, and the possessiveness sizzles in the typical Mary Calmes fashion. (Part of why I love reading her work.) The pairing and the story works. It's engaging and moves quickly. I'm hoping there will be more about them.