"Time for a little payback," Doctor Cockroach thought to himself as he held Susan's wrists tightly in one of his large hands while the other dug around in the pocket of his lab coat. He fixed Susan with a mischievous smile as he bought a length of rope out of his pocket.

"W- What's that for?" Susan asked her voice breaking a little in fear as she saw the rope in the Doctor's hands.

"Oh let's just say that this is for insurance purposes" Doctor Cockroach purred as he began to bind Susan's hands together behind her back. "You, my dear are maddening," The Doctor said with a wicked smile before he continued. "Teasing me all these months with your beautiful, shy smiles and all those lingering looks giving me hope that there could be something between us and then dashing it with a cruel look as if you see me as nothing but another monster," he said with a bitter tone as he fixed her with a vicious look that made Susan's heart feel as if it was about to break.

"But I didn't do anything... I...I didn't know" Susan protested but stopped as he put his hand up for silence.

"Oh really didn't you? You honestly expect me to believe that you didn't know what effect you have on me or how you made me want you more and more each day. Teasing me with the fact that I couldn't do a thing about it in that blasted compound. You know what, I think you knew exactly what you were doing and you enjoyed messing with me," He eyed her up and down and she could feel his gaze as it lingered on her breasts for just a little too long for her to be comfortable with it.

"Did you honestly think you could use me like that and there wouldn't be any consequences? You have underestimated me my dear and no one underestimated Doctor Cockroach" He said pausing for a moment to fix Susan with a devilish smile which made her insides feel like jelly.

"This stops here, the game has changed and you aren't the one in charge any more, I control the board this time," He said and came closer so that their faces were almost touching.

"While you're in my house you are mine" He whispered in her ear, his breath hot against her neck making her shiver slightly. Or was it his words that made her shudder? She wasn't quite sure all she knew was that this whole situation with The Doctor felt wrong and at the same time it felt right and excited her to the very core. She hadn't realised she had been using him like that, tormenting him like that she was ashamed of herself. She was supposed to be one of the 'good guys' and she had been torturing her best friend every day for well over a year now. She couldn't believe that she had been flirting with him like that and hadn't realized it until recently. The crux of the matter was that she really was a monster, this just proved it. The fact that some part of her deep down always knew what she was doing and that it would always come down to something like this. She just hoped she hadn't hurt The Doctor too much in the process.

"Oh Doctor I am sorry," Susan said with conviction and paused for a moment before she added, "What do you mean when I am in this house I am yours?" She asked in her state of blissful innocence.

The Doctor fixed her with the same look of unadulterated lust and he laughed deep within his throat so that it came out as more of a growl than a laugh

"Now that would be telling" he whispered in her ear. Susan had been about to question him again but all thoughts were forgotten as she felt The Doctor's lips touch the exposed skin on her neck as he caressed her gently. His lips were barely touching her skin so they only left only the ghost of an impression against it but, oh what a wonderful effect it had on her. Susan shivered and bit down on her lip again to stop a moan from breaking forth. She strained against the rope but she couldn't break free. She looked over her shoulder to see that the ropes were glowing with the same bright teal of the Quantonium flowing through her veins. She gasped as she realised The Doctor's terrible, but brilliant plan. He was going to make her suffer for teasing him all the time by doing the exact same thing back, making sure she couldn't do a thing about it.

"You're evil" Susan whispered

The Doctor chuckled when he heard Susan gasp. He was planning to arouse more noises like this out of Susan tonight though he had hardly got started. "Oh, ye dearest, you don't know the half of it. Did you think they were joking when they said I was utterly mad?" The Doctor whispered in a growl before his lips were on Susan's neck again. This time however his lips pressed firmly against the naked skin of her neck as he kissed her feverishly as if trying to brand his lust onto her skin with each kiss.

Susan closed her eyes as she enjoyed the moment but no amount of lip-biting could stifle the moan she let out as The Doctor's kiss reached the acutely sensitive soft spot on her neck. Every inch of skin he touched felt alive and full of electricity and she ached for another touch. Doctor Cockroach smiled to himself as he kissed his way down her collarbone and met the zip of Susan's catsuit. Susan opened her eyes and looked down curious about what The Doctor was going to do or if he had finished. If it was the latter she had escaped rather lightly, though she did feel like jumping him like a sex-starved maniac. However it wasn't over, Susan heard the unmistakable sound of her suit being unzipped. She felt like she should protest for a moment but Doctor Cockroach silenced her as his hands made contact with the bare skin of her waist, brushing his fingers along it for a moment before his hand moved to gently caress her bra-clad breasts.

Even as he thumbed over the material of her bra it was painfully obvious that Susan's nipples were erect. A sure sign of her arousal. He slipped his fingers under the cup of her bra tracing along the skin of the wonderful alabaster mounds but never did his fingers touch the spot where she wanted them to go. He continued his kisses, down her collar, her bare skin, her cleavage and finally to her breasts.

Susan's breath caught in her throat and she moaned as she felt The Doctor exploring her breasts with his kiss.

"Oh Doctor" She moaned out loud as Doctor Cockroach moved the cup of her bra slightly so his lips could meet the sweet softness of her bare skin.

"Yes Susan my dear, any requests?" he replied in a deep growl of a voice that made Susan shiver to her very core and she gasped as The Doctor continued the tormenting kiss on her breasts. This newfound pleasure ended all too soon as he gently replaced the bra cup.

"Can you untie me now?" She asked sweetly though there was a pleading edge to her voice. She hoped he would indeed untie her so she could investigate every thought she had wondered about the strange man's almost indestructible body.

"Now why would I do that when I am having so much fun doing this" Doctor Cockroach said as he fixed her with a wicked look before he began to gently nibble and roll her nipple with his teeth through the fabric of her bra. Susan moaned louder this time

"Doctor!" she practically mewled as she leant into his touch. It was pure torture being tied like this unable to do what she wanted to. She needed to feel his naked skin against hers as he ravaged her in lust that would never stop. Yet being immobile like she was she could do nothing but put up with the agonizingly slow way that Doctor Cockroach was tormenting her with his caress, which aroused feelings she had never felt before. Her fingernails bit deeply into her palms as she tried to stop herself from moaning again. It was almost as if she was about to have a pleasure meltdown and he had barely touched her yet. She felt like she was bordering on madness and if Doctor Cockroach didn't free her soon she would climax from his touch and go insane all at the same moment. This was all so new to her and fantastically exciting. Yes, she had been intimate with Derrick but things had been pretty boring really for sex. It was drearily vanilla and if she was lucky she got a little bit of foreplay. But, that was mainly an ego stroke for Derek, who liked to think of himself as a great lover to rival Casanova himself. Though the sex wasn't the greatest, if she was being generous it was mediocre at best if she was honest and that was when they were still having sex. Rather than being plunged into the icy waters of a platonic sex life. Derrick could never really satisfy her in the way she wanted, in the way she needed. He would never make her moan from a single touch, he would never make her feel like a goddess or like the only thing in the world that mattered. Because the sad truth was in the end the only thing that mattered in Derrick's world was Derrick.

Here she had a man who was wickedly intelligent and overall just delicious. Who seemed determined to make her body sing with pleasure. She had never been handled like this before. The Doctor's ministrations were delightfully rough, but they had a soft caring edge to them that she really liked. It was as if he was determined to show her he could overwhelm her with pleasure so easily that she would be a fool to turn down his advances. Not that she wanted to turn down any of his advances, not now when all she wanted was to see what he hid under that iconic lab coat of his. She felt the urge to do a little exploring of his body and get him back. She fantasised about the noises she could get him to make when pressing fevered kisses down his neck and across his stomach. Quickly leading to the danger zone that she was Oh so interested in. She had to admit this wasn't the first time she had thought about what The Doctor was packing. She couldn't help but wonder exactly what his anatomy looked like, would it be more human or more insect-like? Both ideas lingered in her mind as she tried to think of a good way to tell him that he should really strip so she could go to town on him like she wished she could.

It would seem the good Doctor had awakened something rather naughty in his dearest Susan. Something that he would have a hard time keeping in check.