Double Play - Nadia Stafford

Life is good for Nadia and Jack. Their wilderness lodge business is booming, and they're building a new home together, complete with a couple of dogs. It's as close to normal as life gets.especially for a pair of contract killers. But for Jack, semi-retirement is a dangerous proposition. There are plenty of people who don't want to lose his services. He's halfway around the world when one of those disgruntled clients comes for Nadia.
And he has no way to warn her. NOTE: this is a novella, not a full-length novel