Keeping Secrets by Phoebe Alexander

It’s not only their marriage at stake. Their lives are on the line too.

Heath and Harlowe Huxley aren’t exactly the new kids on the block. After starting out as chemists, they’ve both climbed their way up the ladder in the pharmaceutical company they work for. Now managing the company’s premier lab, they’ve uncovered a secret–a devastating secret with millions of lives at stake, including their own.
There’s another couple who works in the company’s IT department: Ian and Charlotte Murphy. They’ve made it no secret they have their eyes set on the older couple–and not in a professional way.
Heath and Harlowe are reluctant at first. Sure, they’re curious. But they’ve never considered themselves swingers. Yet Ian and Charlotte might help them get at the truth, and they both just happen to be hot as Hades.
Are they climbing into bed with the enemy, or have they just joined forces with the couple who can help them save the world?