"Take off your clothes." These are the first words Ivy Tyler-Mark hears from her new father-in-law, notorious billionaire Sever Mark. She came to his mansion to bridge the divide between him and her husband—not to be mistaken for a scheduled playmate. But before she can say "Stop, I'm your daughter-in-law", major boundaries are crossed. What happens next sets her down a dangerous path: He's awakened, and she has a secret to keep. Now, he wants her for himself, and he won't be satisfied until she's willingly in his bed. Ivy is far from willing: she loves her husband, she's not a cheater, and she hates everything Sever stands for. There's just one problem: their chemistry is volcanic, and they both know it. To him, it's only a matter of time. To her, it's a doomsday clock. Can she stop the clock—and herself—before it's too late? The countdown is on.

The second half of the forbidden billionaire romance duet, SLAP/BANG Devilish billionaire Sever Mark is accustomed to getting what he wants—and what he wants is his beguiling, headstrong new daughter-in-law. Ivy refuses to give in to his relentless advances... at first. As she learns about the amazing man behind the armor, she can't help but shed her own. But what will happen when she finally digs up his family's buried secrets—and when her husband discovers hers? Will it end with a bang?