Search - Comparative Strangers (Harlequin Presents, No 1119)

This is a good Harlequin romance. The heroine catches her fiance in an affair with another woman and his older brother persuades her into a fake engagement in order to get a measure of revenge on the cheater. She slowly starts to realize she was involved with the wrong brother! The "borderline rape" scene mentioned by the other reviewer is when the cheating brother approaches the heroine "menacingly". That's as far as it goes.

I really enjoyed this book, but warning: contains a borderline rape scene.