Zara brought it up on a Thursday night.

They were in bed, the lamp on Dex's side still on, him scrolling his phone, her staring at the ceiling with something turning over in her head that had been turning over for weeks.

"I want to try something," she said.

"Mm." He didn't look up from his phone.

"Dex."

He looked up.

She turned her head to look at him. "I want to bring someone else in. Into the bedroom."

The phone lowered slowly.

He looked at her for a long moment. "What do you mean someone else."

"A third person." She held his gaze. "Another woman."

The room was very...