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"Hey."
Martha turned to see Jack leaning with his ear up against the Doctor's door.
"Uh, hi," she stuttered. "What are you doing?"
"I could ask you the same thing," he responded.
"Well I came to see if there was anywhere I could get a drink of water right now, what about you?"
"Well I could have sworn I heard something going on in the Doctor's room, but I'm pretty sure it's just him masturbating."
He laughed when he saw how taken aback she was and gestured for her to come listen with him.
She accepted, leaning her head on the door. Almost immediately she heard the sound of the Doctor's harsh breaths, followed a moment later by a whimper.
She looked up at Jack. "Oh my God."
"I know, right?"
"Maybe we should...let him have his privacy?"
"Probably should, but you have to admit, it'd be way less fun for us."
"Are you seriously getting off on this?"
"Uh, are you not? Don't you wish you could be the one making him moan like that?"
No response.
"I take your silence as a yes."
She admitted defeat and sat there for a while longer, enjoying what they were hearing, before she remembered something.
"Jack, I think we could use one of the screens out in the control room to peek in there."
Jack grinned back at her. "I like the way you think."
They made their way down the hall and pulled the screen up. Jack fumbled with it for a while, muttering under his breath as it rapidly buzzed and hummed.
Finally, the image of the Doctor's bedroom came into focus. He was lying on his bed wearing only his unbuttoned shirt. One hand was pushing a toy in and out of his ass, and the other was stroking himself.
Jack held his hand out to Martha for a high five. "Success!" She accepted with a little smile.
There was a pause before Jack quietly asked, "you don't mind if I have my dick out, right?"
She let out a breath that was almost a laugh. "Just to have it out?"
"Come on, you can't seriously expect me to keep it in my pants with this right in front of me, can you?" He gestured to the screen.
She shrugged. "Only if you don't expect that from me either."
They both snickered as they unbuttoned their pants.
Jack pulled his cock out and began to tug on it slowly.
Martha reached down into her underwear and started rubbing herself.
"God, just watching him fuck himself like that…" Jack whispered. He was talking to himself, but Martha moaned at his words.
She fumbled for a few seconds before she found her clit and began rubbing it around and around.
Hearing the Doctor and Jack panting and swearing turned her on even more, and she reached her left hand down to join her right. Her left pointer finger gently probed at her entrance and slipped inside of her.
Jack wasn't even maintaining the guise of 'slow and steady' any more, rapidly moving his hand up and down as the head of his cock began to leak precum copiously.
On the screen, the Doctor seemed to be heading nearer and nearer to his climax as he moaned "please, please, please" over and over.
Martha was honestly rather ashamed of all the perverted fantasies that formed in her head after seeing the powerful time traveller in such a vulnerable position, but it was comforting to know that Jack was likely imagining much of the same things.
Suddenly the Doctor began to twitch and shake as he jerked himself off at a rapid pace before he let out a noise that could almost be described as a scream and came all over his stomach.
Martha felt her knees begin to wobble as her eyes screwed shut and a wave of pleasure ran through her body with a gasp.
She stood in silence for another moment, catching her breath.
"Oh, shit."
She opened her eyes when she heard Jack's voice, only to see the mess he had made.
"Got it on the console," he explained as he reached over to switch the screen off.
She smirked. "Should have thought about that, huh?"
"Yeah, yeah, I know, I'm a irresponsible idiot."
"There's napkins on a shelf in my room, I think."
"Thanks," he said as he began to head down the hall.
Martha reached her hand out to grab his arm. "Wait."
"I'm waiting."
"Thanks."
"For what?"
"Well, I'm usually not this...open with anyone. Sexually, I mean. So thanks for helping me do that, Jack."
He beamed and responded, "any time. I thought it was nice being a filthy perv with you too."
She smiled back at him and let go of his arm so he could leave.
"Oh, Jack, you don't think he heard us outside his door, right?"
"No way in hell."
"Good."