While the part human's fingers were inside of her, the Time Lord rubbed small circles on her clit, driving her mad. He kept kissing her softly, as her moans became more frantic. Suddenly, his kiss became deeper, and he plunged his tongue in her mouth, just as she broke.
She felt waves of pleasure like she had never felt before. The Doctor was right, it was very intense, and it was just starting. Both Doctors slowed down, letting her pleasure subside. With one last kiss, the Time Lord moved back and sat on his knees, studying her. He looked at his hand which had been touching her, and licked his fingers with a moan. His part human counterpart then held out his hand, the two fingers which had been inside of her extended.
The Doctor looked between the extended hand, the newer Doctor, and Rose, then back at the hand. Rose realized what this was, a metaphorical olive branch. The last gesture of peace between the two men. If he took it, there would be no coming back. It'd seal the deal of the three of them as a single unit, not just two couples with a shared component.
He grabbed the wrist that used to be his, and looked to Rose, who had sat up. He must have seen something in the way she was looking at them both, because he then took the fingers into his mouth, sucking them clean and making it absolutely impossible for Rose to think for a second. He released his counterpart's hand, eyes closed, and breathing a bit ragged.
The Doctor in the blue suit then unbuttoned the single button that was done up on his jacket, and shrugged it off, throwing it off to the side. He kissed her, softly at first, then it became more passionate. She tugged at the hem of his t shirt, wanting it off as soon as possible, and he helped her remove it, only breaking their kiss off long enough to get it over his head.
She ran her hands over his torso. Fingers moving downward until she reached his trousers, which she unbuttoned and unzipped. She then cupped him, feeling just how much he wanted her, and he let out a hiss and broke away from her, shucking his trousers and pants as quickly as he could before descending down on her again, kissing down her neck to her chest.
"Um, you'll need protection," the Doctor who was still clothed suddenly spoke up, right before things could get any farther with the other two. "Her hormone levels suggest-"
The other man broke from his ministrations on her nipples and gasped, "My jacket, right pocket," before he resumed what he was doing.
Rose was still partially wondering if this was all a dream. A very good, extremely detailed dream that she'd be waking up from. What made her sure that this was actually, really real was the condom that was held out by the Time Lord, who was still, maddeningly clothed, and the fact that they were outside of all places, which is a location she had never actually given any thought to.
Brightly wrapped condom in hand, the Doctor kissed Rose properly again, then leaned back, tore open the package, and rolled the contents on himself quickly. He then spread Rose's legs apart and positioned himself in between her knees, leaned forward, and gave her a long, slow, lingering kiss. He then pulled back for a moment, giving her one last chance to stop him.
"I love you, my Doctor," Rose whispered in permission.
"I love you too, my Rose," he replied, then slid inside of her with a groan. He stilled for a moment, a look of awe trained on her, until she kissed him again. Then, he started moving, slowly, little moans and grunts escaping his mouth.
"Oh, Rose," he whispered in her ear. "My Rose. My precious Rose."
He shifted a little, getting deeper within her. She gasped and moaned out his chosen name, which had the effect of making him thrust harder. He started murmuring in Gallifreyan, the musical notes coming faster and faster in the same handful of phrases over and over.

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Breaking Point
FanfictionThe wall between dimensions is closing faster than anyone thought it would. This is the story of what happens when they never make it back to Pete's World. AU Journey's End. Eventual OT3 RoseXDoctor Ten x Rose X Tentoo