Flirting. Swapping. Swinging. Just how far are you willing to go?

Two couples, and an explosive chemistry between them. It was always going to happen, right from the first time they met. It was inevitable they would go all the way... The Other Couple A powerful, steamy rollercoaster of a romance between four people that might just tear them apart, even as it brings them together.

A novel in three parts:

THAT THING THAT NEARLY HAPPENED
"What would you do if all this flirting isn't just some kind of shared joke? What if they really mean it?"

They'd talked about this kind of thing before, but it had never been an actual possibility, the kind of thing where suddenly they needed to know exactly how the other felt about taking a step or two beyond the flirting.

"You think we should have the equivalent of a hall pass? A pass where it's okay to... fool around in certain situations, with certain people? No consequences?"

So how would you want to play this? How far are you willing to go?

WHAT HAPPENS NOW?
It was always going to happen. Al. Casey. Pip. All three of them, together. But once you've taken that step, once you've welcomed another woman into your marriage... what happens now? And what do you do about Pip's husband?

Four people, two couples, and lots of complications.

THAT THING WITH THE FOUR OF THEM
What exactly was this thing between them? Was it a foursome? A menage? None of them really knew, but it was the most heady thing Pip had ever experienced, this complex, messy, four-way relationship between two couples, with no map of the territory, no handbook.

Whatever it was, they all knew they had to take it to a new level. "We should go away," said Pip. "The four of us. Let's all just go away. Find us some us time."

But what happens when things get too intense, threatening to tear everything apart?