The Millionaire's Marriage by Catherine Spencer (HP 2220)

Gabrielle is a model and she's estranged from her husband Max.  Because of a misunderstanding, they never really started their marriage for real.  Now they are coming back together to pretend they are a happy married couple for the sake of her parents who are visiting. This stirs things up again. 

Rating: 3/5 stars, I disliked the separation plot.