Based on the song "Baby don't' you break my heart slow"

Everything belongs to the BBC. Except the song, this version of which belongs to Vonda Shepherd

I like the way you wanted me
Every night for so long baby
I like the way you needed me
Every time things got rocky

Rhys threw another uneaten meal into the bin. Gwen would have gotten a pizza by now. He wished she'd at least let him know if she wasn't coming home to eat. Such a waste of food.

He sighed heavily. That bloody special ops job. It had changed her. All through her training and her first years on the force, she'd come home to him. Her haven, she'd called him. Her sanity. She'd tell him about her day, not just what had happened but how it made her feel. And they'd work through it together, so she'd be back and strong again the next day. His effort towards the public safety, he'd called it, sending her back into the fray every morning.

But she didn't need him anymore. Not that way.

Rhys was dozing when the door opened. He listened to the sounds of her getting ready for bed, creeping in beside him, trying not to wake him. Sometimes now he was so fed up he let her think he was still asleep. But he heard the stifled sobs, and turned to take her in his arms.

"What is it, sweetheart?"

"Bad day," she sniffled.

"Tell me," he said, the way he used to. And hope fluttered in his heart that maybe this time she'd take him up on it.

Gwen thought about the Cyberwoman. She thought about watching Jack, the man she was beginning to almost worship, with his gun against Ianto's head. If he could turn on Ianto, he could turn on any one of them. And most of all, she thought about herself, lying in a morgue, locked in a passionate embrace with another man.

"It doesn't matter, sweetheart," she said. "I'm home now. It's over." And she closed her eyes and reached for him, because it was easier to lie to him with her body when he couldn't look into her eyes. But a different face seared across her eyelids.

I was believing in you
Was I mistaken do you mean
Do you say, do you say what you mean
I want our love to last forever

Gwen fell asleep in his arms but it wasn't long before she rolled away, muttering in her sleep. Rhys reached into his bedside table, pulled out the small velvet box. Looked at the diamond winking inside it. Diamonds are forever. But maybe we're not.