Rated T because it's only talk.
Ianto stood behind his captain seated at his desk and put his hands on Jack's shoulders. He didn't have to see Jack's face to know it was bad. He leaned in a little and asked softly:
"What do you need, Jack?"
The captain turned.
"Go home Ianto. I'm bad company tonight."
"I don't want to go home."
Ianto squatted down.
"I want to be here with you. Whatever it is that's causing you pain - bury it in me."
The captain's gut clenched. Arousal, need, and something a lot darker and more dangerous started to rise inside him.
"You're not up to that."
"Wouldn't be the first time, would it?"
"Yes it would. I've never before fucked you until you passed out from pain."
Ianto swallowed hard, briefly closing his eyes and then lifting them to the Captain's again.
"OK", he breathed, trying not to let on exactly how terrified he was. "If that's what you need to find release tonight, then use me."
Jack closed his eyes and let out a breath, his head dropping.
"Go home, Ianto. This isn't what I want. You're not what I want."
It cut right through Ianto's heart, but he didn't move a muscle.
"I won't leave, no matter what you say to me." No matter how much it hurt.
"Get used to it, Ianto, there's nothing you can do for me. Get out of here." While you can.
"Please Jack. Let me try. Give me a chance to please you."
"Get. Out. And don't come in tomorrow. I don't wanna see you."
"But..."
Jack moved way too fast for Ianto to react. The next thing he knew was that his back hit the wall. Hard. It knocked the air from his lungs.
"You're nowhere near what I need. You can't please me, no matter how hard you let me fuck you. So get out or I swear I'll beat the crap out of you before throwing you out."
The captain made sure Ianto had really left before he collapsed back into his chair. He told himself it had been necessary, the only way to make Ianto leave, but still it had been cruel. The alternative would have been worse though. He could still feel the tension build up, knowing it would eventually lead to him causing pain and destruction. Not to Ianto though.
His fist hit the wall. The blazing pain racing through his arm and shoulder felt right. Like release. Like salvation. The blood from his split knuckles ran warm down his wrist and dripped to his office floor.
He hit the wall again. And again. Doing new damage faster than his body could heal. The physical pain began, finally, blissfully, to mask the emotional agony he'd been in since the Doctor had told him to stay away from him. For all of eternity.
TBC