Rico's Secret Child Book

She is too ashamed to admit that she was previously married and the marriage ended because her ex physically abused her. This leads to a big kerfuffle because the hero, who lusted after her but never fully trusted her, thinks his suspicions were justified when her divorced status comes to light.

Hero originally thought heroine was a member of the golddigging hall of fame and that she wasn't even picky about who she got, whether it was the hero or the hero's father, as both were millionaires. He never apologized for any of his insults to her even after he started to get to know her and realized his first impression was off. Nor did he ever hint that this affair between them was anything more than a no strings fling like he had with a bunch of girls who preceded her. After the whole ex-husband showing up drama, she ran and he didn't even bother to go after her.

It is left to the hero's sister to tell him the truth about heroine's abusive ex-husband so they can clear up the Great, Big, Terrible Misunderstanding. I thought it was stupid to build up so much angst and not have the protagonists ultimately confront it head on with each other. Instead the resolution is made off the page via a third party. Cop-out imho.