It was all meant to be so easy. Payback with a difference.

I'd stay in Ballyholme, Northern Ireland, to decide whether to forgive my cheating husband, Ryan. Ciara, my new best friend, would stay in our London home, free of charge, until I made up my mind.

The ruse certainly had its plus points: Ciara's unexpected appearance would freak Ryan out, and my disappearance should make him regret his roving eye.

But now I learn Ciara has evidence ... evidence that my husband has committed murder. And she's no longer answering my texts and calls. Is it some sort of blackmail plot? More worrying, if Ryan is indeed a killer, could he strike again?