A/N: So, River gets an unexpected surprise when she hides in the TARDIS. This chapter is almost complete smut, so if you want to avoid that, read the summary at the very end of the next chapter. I just added it now. I do not own Doctor Who. All reviews are welcome, but this is my first try, so please be nice!

Chapter 1: Something Unexpected

River rushed into the TARDIS and slammed the door, slumping against it.

"Doctor?" she called, noticing the console room was empty. Receiving no reply, she stood up, locked the door, and wandered over to the console. "Is he in here, old girl?" she asked, gazing up at the TARDIS with a faint smile. The TARDIS hummed an affirmative. Glancing nervously at the door, River went to work at the controls, sending the TARDIS into the vortex without a bump. After a moment, River pulled the monitor over to face her and smiled in relief. The things she had been fighting were now far behind her, both in time and space.

Just then, there was a noise, and River spun around. The Doctor stood there, wearing a bathrobe and looking haggard, like he needed sleep. River smiled. "Doctor!" she said, and took a step forward.

The Doctor gave a shout and stumbled back. River stopped, confused. The Doctor wrapped an arm across his nose and mouth and stared at her in horror.

"What are you doing here?" he asked, his voice muffled by the terrycloth.

River took a cautious step forward. "I was just stopping in for a visit, Sweetie. That is all right, isn't it?"

The Doctor started to reply, but River stepped forward and pulled his arm from his face. "What? Am I contagious, or something?" And then she realized what the look on his face and the reluctance to breathe meant, and she stumbled back. "Oh. Oh, no."

The Doctor stared at her, and slowly his pupils dilated until there was hardly any green in his eyes. His lips drew back, revealing teeth that she didn't remember being that sharp. Her breathing quickened, and his nostrils flared. "Now, Sweetie…" Desperately, she groped at the console behind her, her hands searching. Without warning, the Doctor lunged. River screamed…

And lashed out, jabbing the needle in her hand hard into the Doctor's neck. He stiffened in surprise, then fell back, flopping to the floor with a thud, unconscious. River gasped, hyperventilating, and dropped the needle. She had known this day would come, had put the needle there for that reason, but she hadn't anticipated how awful it would feel to press it into him, push the plunger down. She had maimed and even killed before, but she loved him; that made it worse, that made it matter. Quickly, she knelt and checked his pulse. It was normal. Shakily, she stood and set about preparing things.

From the bathroom, she got some aspirin, one of which she swallowed before crushing the rest into water and smearing it about her head and neck, even dripping some in her hair. Then she reached into her secret cabinet, which only she and the TARDIS knew about, and produced an unopened box of condoms. She wasn't sure whether she would be able to use them in time, but they needed to be nearby, just in case. Then, she changed into a tight leather jumpsuit and made her way deeper into the TARDIS. Along the way, she left clues and tools, to make things easier. She didn't really want to get anything more than flesh wounds.

The Doctor woke up with his nose first, sniffing before he even opened his eyes. Ah. There she was. He noticed a throbbing in his neck, and probed at it experimentally. Ouch. There was the bruise, and a little bit of tearing from the rough entry. He opened his eyes and bared his teeth predatorily; he could see the trail of her scent in the air, an alluring deep indigo-blue color. The Time-Lord ached with a centuries old instinctual need for his wife. He stepped forward.

River, meanwhile, had locked herself in her room, leaving the key somewhat farther down the hall. Quickly, she rubbed off her makeup, and dressed the bed. Then she took everything that was not the bed and pushed it into her closet, which widened in order to accommodate the contents of her room. After casting a critical eye across it, she reached into a drawer and splashed citrus oil liberally across the blankets. Then, she waited. Soon, she heard a sound in the hall, half snarling, half whimpering. It was time.

The Doctor stopped just inside the hallway and examined the thing he had stepped on. A small brass key. Through his hormone-addled brain came the thought that this must be River's key. After all, it was covered with her scent. He picked it up, and the increase in her scent around him caused him to pause long enough to tear off his clothes, all except the bowtie. Then he went on, carrying the key, until he came to a door which, to his eyes, was currently billowing indigo-blue, River's scent. He tried the handle and growled when he discovered that it was locked. Then he remembered the key.

River watched the lock turn, and trembled, steeling herself. The door swung open, and to the Doctor her scent was now tainted red with fear. He inhaled deeply and smiled.

"River," he purred, slinking toward her. Then he jumped towards her suddenly, and she squeaked and tried to jump aside, so that he landed on her legs. He growled and kicked the door shut behind him, then yanked, so that River was sent crashing to her knees. Roughly, he forced her to her lean forward on her hands in front of him, straddled her hips…

…And shoved. River gasped, and he growled in frustration. He hadn't noticed her leather jumpsuit, and he shoved again. River moaned as he pushed the leather two inches inside of her; it had been designed not to have any give, so that the forced attempt tightened the leather painfully around her chest and neck. Still growling, he flipped her over and tried again. When that approach didn't work, he sat back and cocked his head, growling in frustration.

River took his momentary distraction as a chance to reach out and grab his member. At once, he howled and jerked in surprise, then bared his teeth. River let go, and just in time, for the next moment, he landed on her chest, his face in hers, growling. She turned her head and closed her eyes, careful not to make eye contact. Then, she felt his hand on her face.

The Doctor didn't understand what had happened. He should be inside of her by now. But, for some reason, something was stopping him. And then, while he contemplated what to do now, she had grabbed him. The feel of her hand was too much for him in his feral state, and he had almost exploded all over her. He pulled away and flattened himself against her. He finally decided that the problem was that she didn't want him, and he knew he had to fix that. He grabbed her chin, turned it to face him, and kissed her.

River made a noise of surprise against his mouth, and the Doctor took the opportunity to push his tongue into her mouth. River moaned. Even half-crazed, the Doctor knew how to get her riled. She circled his tongue with hers, and pushed it into his mouth. He stilled.

The Doctor suddenly grabbed the back of her head, pressed it against his, and bit down on her tongue. As he had predicted, she struggled, but he sighed as his industrial-strength pheromones drained into her blood stream. She stopped struggling after a minute, then hung limp. Satisfied, he unclamped his teeth and leaned back, examining her, giving his venom a moment to take effect. While he waited, he looked around. Something caught his eye, and he smiled, reaching down and tossing River over his shoulder.

River barely noticed him picking her up. All she could think about was her sudden intense need, and she moaned as her legs swung and bumped into each other, stimulating her now-very-sensitive Time Lady parts. She did, however, notice when she was tossed down onto something that bounced, and the Doctor landed on top of her. She moaned again, and hazily realized he must have moved her to the bed. Then he leaned over next to her head.

The Doctor mustered all his brain power to whisper "Why can't I get inside you?" River moaned in answer, grinding her hips against his. His mind went blank, and he whimpered. River stopped, and her hands fluttered at her throat. The Doctor realized that there was a zipper there, and desperately he grabbed it between his fingers and yanked it down, so that it folded away to reveal her clavicle to crotch. River gasped at the sudden cold against her skin, then pulled her arms out of the sleeves and kicked her legs, freeing them. The Doctor leaned over and yanked it out from under her, tossing it aside. Then he froze, his face inches from hers, breathing deeply.

River realized he must have smelled the oil. The oil meant to hide the aspirin on her face and hair. His gaze became sharper for an instant, and then he growled and pressed his mouth to her throat. River moaned, first with pleasure, then with pain as he bit down against her jugular. Dreamily, she kissed her mind goodbye at the rush of hormones filling her. Then she moaned. The Doctor unclamped his mouth from her neck, and licked at the wound in apology. River tried to focus on what she held in her hand- a condom- but at that moment, the Doctor flipped her over and pinned her against the sheets, oblivious to her struggles. He again straddled her hips, and…

…thrust, hard, filling her completely in one smooth motion. River jumped, startled, and tears streamed down her face. The Doctor noticed, and he instinctively knew this wasn't right. Leaning back, he looked closer at the point where they joined and realized that below it, the sheets were slowly turning a wet, dark red. Oh.

River held still- she hadn't expected losing her virginity to hurt this much. The Doctor leaned over and kissed her neck, sucking and nibbling down the curve to the top of her spine. Then, he slowly placed his mouth over the bite mark he had made a moment ago and fitted his teeth into it, gently. A new substance oozed into her blood stream, and River sighed at the relief it provided. Then, all the hormones he had injected into her moments ago came flooding back and she ground her hips. He removed his teeth from her neck and hunched over her, pinning her arms. Slowly, he began to thrust, and then faster and faster, River whimpering beneath him. Larger and larger he grew, filling River, till he was so big that he could barely pull back to thrust, River making small noises of need and pleasure beneath him. Higher and higher he went, the world swirling away beneath him, she felt so good, he was the first, he was going to cum… He was going to cum. He slowed and River mewled in protest. "River?"

River heard his voice, but didn't respond, hoping he would continue. But he didn't.

"River, I'm going to cum. I can't even pull out of you, I'm stuck." River made a noise; so what? Why was he stopping for this? "And, River, if I cum… you will get pregnant. Do you want that? Because otherwise we're stuck like this." River thought about it for a second, or tried to; but in the end, the lust of her own body and the pheromones finely-tuned to her that he had injected in a rather unorthodox way won out, and she answered by jamming her hips back against him as far as she could.

The momentary clarity that the Doctor had managed vanished, and he plunged deeper into her, hard and fast. She mewled again, and the noise sent him over the edge. The world crashed around him, and his blood pounded in his ears. Quickly, he filled her with his essence, and there was so much that it overflowed and trickled down between their thighs. This proved too much for River, and she screamed as she came, hard and fast. The Doctor leaned over and pinned her down, snaking one arm under her to play with a hardened nipple. River yelped and her climax continued, driving her higher and higher, until the pleasure was too much and she blacked out.

The Doctor leaned back, letting her rest face down on the bed. He leaned down and slowly slipped himself out of her. Then he reached in and pinched her folds shut to keep his cum inside of her long enough to impregnate her. His eyes were still huge and dark with desire, and his teeth still sharp. He knew that the need to impregnate her would not recede until he actually had. He waited another minute, then, feeling his intentions take effect inside of her, he let go and sat back. Slowly, his eyes returned to normal and his teeth rounded or flattened accordingly. He sighed and looked around at the mess, then headed out to shower and dress before starting on the room.

River woke with a start, disoriented. She was in a night gown, in bed… but not her bed. Without sitting up, she craned her neck. She was in a guest room in the TARDIS, tucked into bed with the covers pulled up and the lights low. Glancing to her left, she noticed that the Doctor was asleep in a large armchair by her bed. She moved to stand, then moaned loudly at the sharp pain between her legs. The noise caused the Doctor to startle awake, and he immediately leaped to her side, grabbing her hand.

"River? Are you alright?" He stared down at her, a concerned look on his face. River stared back helplessly.

"What… happened?" Her voice, ordinarily strong and cocky, trembled and threatened to break, and she tried not to burst into tears.

The Doctor frowned apologetically. "River, I'll explain everything, I promise. But right now, you need to rest. Here, I'll give you something for the pain…" He fumbled with a syringe for a moment, then pressed the needle into the fold of her elbow and pushed the plunger down. The pain and the world, hand in hand, swirled away and darkness descended.

A/N: So, on to Chapter 2! Press the little arrow thing. I think you'll like it. I hope. Also, review! Reviews are brilliant! And good. And cool. What more do you need?