If you love someone you cannot help but have sex with them.
If you have great sex with someone you must love them.
If you love someone it is okay to blackmail them into having sex with you because you are meant to be together.
In addition to not agreeing with any of these underlying romantic principles and finding the initial set up entirely implausible, I found the story strangely lacking in tension or conflict. Still, it was sort of nice to see grown-up, relatively mature and rational characters instead of ones who act like hysterical and possibly retarded children, as so many romance protagonists seem to. Nice for them that they got some orgasms and marriage and stuff.