Disclaimer... I do not own The Mortal Instruments or any of the characters.

Clary was sitting in a pile of rumpled dress fabric on the honey coloured wood floor. Her hand had moved to the emerald around her neck,rubbing it nervously.

"Come on Clary, you have to get up" Simon pleaded, bending down to her height.

"I don't know…" Clary said, looking trapped.

"It's just pre-wedding jitters" Isabelle called from the window, where she was staring out at the rows of seats and the aisle.

"Did you get that from the classic textbook on weddings?" Clary asked.

"Yeah, I borrowed it from Magnus"

"Better not let Alec hear you" Simon chuckled, before reaching down to Clary and pulling her off the floor in one smooth movement.

"Oof" she said grumpily, glaring.

"Iz, you can go tell them she's coming, we'll be there in five"

Isabelle nodded, gathering up her long skirt and kissing Clary on the cheek affectionately.

"I'm going to have a sister" she whispered in Clary's ear, and her eyes widened. She hadn't considered that aspect. Alec and Isabelle as her siblings. But then, if Izzy and Simon ever got married, or Alec and Magnus… Oh dear.

"See you then" she told Isabelle, who smiled at her softly.

Then Isabelle was gone and she and Simon stood in the kitchen of Luke's cosy farmhouse, with tiny translucent raindrops beating down a pattern of smoke and lace, feathers and crystal.

"You ok, Fray?" he asked softly.

"Yeah, I'm fine Simon"

"You ready?"

"Erm, I guess?" she responded hesitantly.

Simon wrapped his arms around her, and Clary relaxed into the hug, reaching for childhood memories of sunlight and snowmen and oatmeal raisin cookies.

"You'll do great" he murmured into the top of her head.

"I love you" she said, standing to brush her lips to his cheek, and he smiled fondly. "I know"

She rolled her eyes, and started from the room "nerd"

"What if she's not coming? What if she decided she doesn't want to marry me and she and Simon are flying to Mexico as we speak? I mean, who would want to marry me?"

Alec watched his paratabai with some amusement at the uncharacteristic nervous behaviour.

"I think Izzy might be upset if Clary took off with Simon to Mexico" he said.

"True. But I think Isabelle would probably go with them. She likes Mexico"

"I think she likes the margaritas more than anything, and besides, she's right there"

Alec pointed at their sister, who stood with a bouquet of white lilies at the head of the aisle. The whole party had been moved under the marquee as the rain started, but the various guests attending had strung up a complicated network of witchlight, which shone down on everything with a pearly glow.

"Ok, I see her. Get up the aisle" Alec corralled Jace with some difficulty as he kept twisting around to try to get a glimpse of Clary.

Luke and her mother blocked their view, as they took each of Clary's arms, with Simon and Isabelle walking in front. Clary had insisted that some aspects of the wedding stay mundane, the two were going to exchange rings for that reason, and she wanted a flower girl. One of the Blackthorn children had been recruited for that purpose, and the little girl solemnly scattered rose petals, that Magnus had spelled gold.

Isabelle and Simon started their slow walk down the aisle, Isabelle graceful even in seven inch heels, and Simon nearly falling over on several occasions as he gazed adoringly at her.

Finally, they made it to the front, and Alec watched Jace's face as he saw Clary. Awe, adoration, shock and impossible love chased themselves across his face and his golden eyes shone brighter than Clary's gown, which sparkled under the witchlight.

Both Alec and Simon traded glances full of commiseration as they tugged simultaneously at their bowties in ButterBall Turkey Shimmer. Clary and Jace didn't see them though, as Luke released her with a kiss on the cheek and Jocelyn pulled her daughter into a fierce hug.

Jace pulled her to his side, gazing at her in wonder. Alec handed him a stele, and Izzy handed Clary one. Without breaking their gaze from one another, they both took them. Jace went first, tracing a gentle rune on her arm. Clary didn't even feel the familiar burn of the stele as she watched the delicate bones and muscles in his hand. He finished and she began to draw on his arm.

Compared to all the other runes she had created or strengthened, this was nothing. It was like writing a sentence about the weather versus writing a five page essay about the weather patterns in her area. But it was so strong that her whole body shuddered with the unrestrained elemental power of it. She felt a slight burn from her matching Mark, and watched with fascination as the two lit up slightly with a shimmer of gold.

Jace placed a hand on her shoulder to steady her, and lowered the neck of her gown a few inches, placing the tip of the stele just above her heart. A surge of heat moved through her, and this wasn't the pleasure-pain sting of the stele, this was a deeper heat, one that swirled in her heart and spread through her whole body until the tips of her toes were tingling with warmth. He finished the rune silently and she started his, smiling softly at the thick black line that came from the end, at the mark of their bond.

As it was finished, both new Marks burned not painfully, but pleasantly. She felt like her whole body was waking up for the first time, her vision was sharper, her legs stronger. Clary knew in that second that she could leap a ten toot wall with no trouble, or run twenty miles without tiring. Jace's eyes sparked and a slow smile crept across his face. He pulled a simple band of gold with an emerald set into it from his pocket, and slid it gently on to her outstretched hand. She carefully placed a gold ring on his finger. Jace barely let her finish before sweeping her into his arms and kissing her like he hadn't seen her in years. The heat from the Marks burned and concentrated in her lips, so kissing Jace felt like his mouth and hers were burning hot.

Finally, they broke apart gasping as the crowd of Shadowhunters, werewolves, and the occasional vampire or warlock whooped and cheered.

Apparently the custom of the bride and groom dancing the first dance was lost here, as with a grin of absolute glee, Isabelle darted up and seized Clary about the waist, spinning her into the crowd as music started to play.

Finally, after dancing with what felt like every single guest, she was returned to Jace, gasping to try to catch her breath, her hair falling and her cheeks rosy. "Hello Mrs Herondale" he murmured in her ear and she looked at him incredulously. They had never really discussed whose name she would take- Jace had so many. Lightwood, Herondale, Wayland, Morgenstern. She knew it would be Lightwood or Herondale, Wayland and Morgenstern were memories better left in the past.

"So you decided then?" she asked

"I talked to Tessa. I am the last Herondale. I couldn't just let that slip away. So, if it's ok with you- I'd love it if you would take my name"

"That sounds good. I like your name"

"Good" he whispered, before holding her tight in his arms and sweeping her gently into the mass of slowly dancing friends.

Five years later

"Isabelle!" Clary called. Simon and Izzy had finally gotten married last year, after Magnus had indelicately pointed out that they weren't getting any younger. Alec and Magnus had married in a quiet ceremony, with no gold and Chairman Meow officiating. (According to Magnus, the Chairman had been ordained the previous week. Nobody really believed him).

Isabelle came to the door of her bedroom, hopping on one foot as she tugged a heel on. "Coming, coming" she grumbled, before grinning as she saw Clary.

"I think you grew since yesterday"

Clary wrapped her arms around her swollen stomach "baby's a kicker. It kicked me so hard last night, I woke up"

Isabelle regarded her sister-in-law. "You still don't know what the sex is?"

Clary shook her head "I don't care, as long as it's happy and healthy"

Clary could see a slight pain behind Isabelle's bright black eyes. The other woman had become pregnant soon after her wedding, but had miscarried five months in. The pain still lingered, especially after the Silent Brothers had told her that a long life of Shadowhunting and numerous injuries had left her unable to bear a child. She and Simon were getting through it though, and were considering adopting at some point in the future.

Clary remembered finding Isabelle huddled on the floor of the bathroom, slicked with blood and letting out choked wrenched sobs. Two days later, Isabelle had come out of her room smiling and bright again. It happened sometimes, she told Clary, Shadowhunter women didn't have an easy go of it, and their bodies took a lot of punishment.

"Where are we meeting Magnus for lunch?" Clary asked, and Isabelle shook her head "I'm not sure, he told me he'd pick us up"

The two linked arms, Isabelle supporting Clary slightly and headed to the Institute doors. Clary smiled at the Mark on her arm, still as coal black as the day she had received it, and pressed a hand to her stomach. All was well.

THE END

Thank you to everyone who read this story. It was such a fun fic to write, and i hope to write more TMI and TID in the future. Pretty please review if you liked it, and even if you didn't i would love some constructive criticism.