The walls and floor of the new room were flagstone, and it had a huge triangular three-person tub nestled into a corner. I looked overhead, and there was a massive rain shower head, maybe a meter square, without an enclosure, above the centre of the room. This whole room was just for bathing. Kate reached outside of the door and groped for something, and the lights went dimmer and more amber, making the place almost look like a secret grotto.

"You like?" she grinned at me.

I certainly did. She sauntered to the corner and turned the taps for the tub on, with the water slowly rising. She then pushed...