Once in a Lifetime by Jill Shalvis

Ben and Aubrey's relationship is erm...interesting:

               He put his finger under her chin and brought her face back to his. "You've been crying," he said again.

              She blew out a sigh and slapped his hand away. "You're a man. Your're not supposed to notice." 

Ben he's a nice guy always wants to do the nice thing:

                    "It's the neighborly thing to do," he settled on. 

                    "We're not neighbors." 

                    "Okay, it's the thing to do for someone who screamed your name as she came." 

He sometimes likes to give Aubrey pointers, "you should feel free to show me this bossy side of you in bed anytime." And he loves to give her compliments, "you drive me crazy," he said against her mouth. "You taste so effing good. You always taste so effing good." He really tries to do the nice thing, "so you're being a gentleman by stripping?" He also learns that a drunk Aubrey is sure a fine thing to deal with, "okay, first of all, I didn't sleep with you to make amends. I slept with you because I wanted to." He stilled didn't say anything, and she pointed at him again. "And you know what? It was your own damn fault. It was those jeans you wear, and the tool belt. It was the size of your hammer!" Never a dull moment with these two and that's why I loved the book.