Finally I have more Sizzy for you! This one won't be fluffy really though it is their first time… is it fluffy? I'm not sure… it's a lemon though ;) it will have some sexy blood sucking though… I hope it's okay :) Thanks everyone for reviewing I'm so happy I have so many different pairings and groupings to write.

Characters belong to Cassandra Clare

"Oh shit, sorry Izzy-" Simon said in a panic, he had opened the door to Isabelle's bedroom without knocking and she was standing in front of the mirror completely naked.

He turned away and half closed the door behind him, but Isabelle just laughed softly. "I'm not that hideous am I?"

Simon went rigid, uncertain on whether or not he was supposed to turn and look at her or not. "No, you're not at all hideous you're… you're so hot, I mean- shit."

She was laughing louder now, "Calm down Simon." Secretly she loved when he got all flustered and said all the wrong things, she thought it was adorable.

"Come back inside."

"Really?"

"Really." She said, "And shut the door behind you."

He looked shocked as he did, determinedly looking anywhere but at her naked self despite Isabelle standing right in the centre of the room, flaunting her body at him.

"Look at me Simon." She said gently, teasing very slightly.

His eyes continued to flutter around the room taking in the surroundings, but slowly they came to rest on her. She had giant boobs, but he had always known that, and she had the most beautiful figure he had ever seen. Yes it was sexy as fuck, but also she was beautiful and he knew she didn't get told that enough.

"Do you think I'm sexy?" She purred, as if she could read her thoughts.

"I think you're beautiful-" He said, biting his lip, embarrassed.

The corners of her mouth twitched into a smile, and she took a step towards him. "But do you think I'm sexy?"

He gulped uncertainly, but then he nodded and Isabelle's smile only grew wider.

"You can touch me Simon." She murmured seductively, lowering her eyelids and peering at him through her lashes.

"What?" He breathed, Isabelle did her best not to laugh at his obliviousness.

"Do you want me to help you?" She asked, taking another step.

"How do you mean?"

She reached out her manicured fingers and took his wrist, guiding his hand to her right boob. She released her hold on him and watched him, smirking, as his hands felt her boobs like they were fourteen year olds touching someone else for the first time. He gingerly moved to feel the other one, and Isabelle made a small noise of pleasure so that he would think he was already doing greatly though really somebody touching her boobs had never made her feel hot before. She took another step towards him and stood up on her toes to plant a kiss on his lips, very lightly, it was more just their mouths brushing against each other for a second. When he tilted his head forward they kissed properly, and as he clearly had no idea what he was doing she took control, moving her tongue to fit his and guiding his head the right way.

"I really like you Simon." She mumbled into his mouth.

"I really like you too." He said hesitantly, like he wasn't sure if he was supposed to say it.

"Only tell me it if it's true." She said almost sternly.

"I really like you."

She smiled and took his hand, and walking backwards she pulled him gently, until she perched at the end of her bed.

"Do you want to kiss some more?" She asked softly.

They had been in a bed together before, he had slept in her bed and he had drank blood from her but they had never felt each other or kissed or seen one another naked. When he nodded she shuffled back on the bed until her back hit the pillows and he crawled with uncertainty towards her. She circled her legs around him and sat almost on his lap, and she kissed him passionately. Again she was taking control of it but he was slowly getting better at it and didn't need her to guide his head and he moved his tongue at all the right times. Isabelle had had mindblowing sex before and most guys she had been with all knew what they were doing, but being with someone like Simon who had no idea what he was doing was… nice. It felt nice to know that to him she wasn't just another girl to screw, but she was hopefully going to be his first time and he would remember it, and they hadn't only just met eachother. She had never liked anybody else, never loved anybody, she had just found them sexy, fucked them once and then never seen them again.

"Kiss my neck." She whispered.

He looked shocked, "Isabelle, your neck? It's dangerous enough to just be this close to you…"

Her fingers brushed softly across his cheekbone, "Simon, I want you to feed from me." She said gently, "You barely eat enough and it's better to have it straight from the vein…"

"I could hurt you!"

She shook her head and stroked his cheekbone some more, and then leant her forehead against his. "You won't hurt me. You didn't before, remember?"

He shook his head, "There's a first time for everything."

"Simon…"

"I really really really don't want to risk it, if I caused you any pain-" The worry was clear on his face and in his voice too, the way it cracked on the word 'pain'.

"Please." She said gently, taking his hand and kissing his palm softly.

His face crumbled, "Isabelle we shouldn't…"

"Please."

"Why do you do this to me?" He pleaded and Isabelle squeezed his hand, looking up into his eyes.

"I like being close to you. I like being the one to help you survive…"

"You can't be my food, you're a girl, a girl I like, not my meals."

She shifted to sit on her knees so she was more on his level and looked him right in the eye. She moved her hair from hanging over her shoulders and tied it swiftly so it was out of the way, and when she stretched her neck he must have smelt the blood coursing through her veins because he winced, inhaled deeply.

"Do it." She whispered.

Slowly and gradually his lips met her collar bone. His fangs dropped and he bit down on the skin of her neck, her warm blood flooding his mouth. He welcomed the feeling of being dizzy with pleasure with open arms. As the warm, red liquid dripped down his throat, Isabelle's nails sunk into the skin on his back and let out a low mewl of pleasure. He wondered how she could find the pain of his fangs piercing her vein so hot but then Isabelle was strange like that so he didn't bother to question it. His arms were securely gripping her naked body and then he heard her moans and pulled his teeth away so he wouldn't take too much. He licked the blood from the small puncture wounds and Isabelle smiled like she was in a dream. He placed a kiss on her nose and thanked her quietly. Isabelle lay back and he thought she was about to go to sleep but no, she waved her finger sexily as if to say, come here.

"I think I may feel more for you than just like." Simon said weakly, and Isabelle just smiled and reached for his shoulders, pulling him down over her.

"I think I may almost…" She started, but couldn't bring herself to speak the words love, not yet.

"Mutually feel more for me than just liking?" Simon offered, quirking an eyebrow.

Isabelle giggled and then, her hands moved from his shoulders and then she was unzipping his jeans and then she was pulling him even closer to her…

"I feel more for you than just like but maybe we could make love?" She breathed, and he nodded, saying no words but his nod was enough.

"I don't know how." He admitted, slightly embarrassed.

"Take my underwear off." Isabelle whispered so quietly he barely heard her, if it weren't for his vampire hearing it would have been completely silent other than his heavy breaths, though of course he wasn't breathing thanks to being a vampire.

With clumsy hands he slid her thong down, over her ankles, and he placed it on the floor. His jeans were already unzipped so he just had to step out of them. He wasn't sure if she would laugh at the size of his cock, but she didn't, she just pulled him back towards him. She stroked his face and his hair and then he kissed her again, softly. Spreading her legs to make it easier for him. She kept her hands on his shoulders as he slowly entered her slit, this was finally happening. He went so slowly, she wondered how he knew to enter slowly, a lot of people had just rammed themselves into her and it hurt a lot of the time, but this just felt so gentle it was romantic. When he got as far as he wanted, he pulled out uncertainly, and then went back in, and he was getting better by the second. Isabelle was moaning loudly now, her nails clawing at his back, and he had his hands on the head of the bed now. Soon he was grunting too, groaning her name as she whimpered his. When he was done he rolled over so he was on his side, looking at her.

"I love you." He spoke the words for the first time.

"I love you." She said hesitantly, but when she said them a second time she sounded so sure it made Simon smile.