Sydney's Sin (A Christmas Wife Watching Fantasy) by Kirsten McCurran
Kevin does not have the expected reaction when his wife, Sydney, tells him her old office crush, Nick, made a pass at her during a company Christmas party. Instead of storming off to deck his nemesis, Kevin instead tells Sydney that the thought of her in Nick's arms, kissing Nick, turns him on. Sydney is confused, and aroused too, but she can't believe her ears when her husband suggests that if Nick should hit on her again, perhaps she should not push the younger man away. When Sydney disappears from the party with Nick again, Kevin can't just sit back and wait. He needs to know what's happening. When he peeks through a bedroom window he is astonished by what he sees. His proper wife is a sex goddess in Nick's arms, giving herself to the younger man fully. Can Kevin ever erase Sydney's Sin from his mind?