Okay, another crossover. This time this a combined universe/timeline with 'My Little Winter Sprite' by Puella Pulchra, with their permission, and I would highly recommend reading the story before we go any further so you can understand what's going on. It's a lot shorter than 'Friend or Foe' and any of the 'Mimpossible's so you should be done quickly. I can wait

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Done? Good. How the whole thing with Isabelle will work will be explained next chapter and I will be using Puella's version of the cannon characters. Both Jackie Bennett and Sarah Jessup are her own characters, as is Isabelle. Jackie Davies and Taboo are mine. The rest are technically Dreamworks, but most of these are older versions of the characters.

I think that's it, so without further ado, here we go!

Jack Frost nimbly left through the window of Sophie Bennett's place with a smile, wishing his love goodnight and then taking to the clear night sky. He spun somewhat lazily in the air before starting to fly, looping and diving with the wind while laughing all the way.

He was not aware that on the ground below, someone following him.

The figure below had to run flat out to keep up, not that it was an issue for her, even with the February snow blanketing the ground. In her hand she formed a snowball and taking careful aim she flung it at the winter spirit to get his attention.

The projectile hit the back of his head, causing him to start spinning head over heels, crying out in surprise. He quickly regained control and spun around, looking for where the projectile had come from.

Finally looking down, his face split into a grin and he dived down to greet the familiar face.

"Hey Jackie!" he said, hovering just in front of the brown haired young woman. His grin started to fade when he realised that she was looking at him through her glasses with a stern glare of disapproval, in some ways looking scarily like his own mother. It was something he was noticing as she got older.

He landed and looked at her curiously, although he could guess why she was looking at him like that. "What's with that look?" he asked lightly.

"You know exactly why." Jackie said calmly, with a small hint of irritation.

"Isn't it a bit late to be spying on me, or were you waiting outside Sophie's house like a stalker?"

Jackie shrugged. "I'm patient, and I had food with me." she indirectly answered the question.

"That's a little creepy Icicle."

Jackie ignored that. "I needed to catch you before you disappeared."

"To tell me that you disapprove?"

"She's 300 years your junior, don't you think that's a bit odd?"

"It's not as if I look it."

"You don't act like it either."

Jack opened his mouth to counter, and then realised she had a point.

"True, I don't act like an old man." he said.

"No, otherwise you wouldn't be dating someone several centuries younger than you."

"You date Jamie!"

Jackie raised her eyebrows and sent him a look that said 'really?'

"That's the worst comparison I've ever heard." Jackie said, "5 years is not 300, and I waited until he was in college."

As Jack floundered Jackie had another argument.

"Also, she's going to age. I know you can age your physical age at will, but that's only a few years either way. What are you going to do when she's my age?"

Jack deflated, not having answer.

"I don't think we're thinking that far ahead."

"I should hope not."

Jackie's then expression softened. "Sorry, I just felt like you needed a reality check, and although I disapprove, I can't stop you, you know." she shrugged again. "I'd better go home and get some work done. See you around Snowman."

"See ya Icicle." Jack did look a bit out of sorts now, but Jackie decided it was best to let him think it over himself.

"Are you sure that was a good idea?" Taboo asked, having remained silent for the conversation.

They're both my friends, and this won't work in the long run, I just want to help them before they get hurt.

"Even though this might hurt them."

To that Jackie struggled to answer.

Maybe it's better if that hurt came from an outside source.

"You don't know that though."

Jackie didn't respond and Taboo sighed.

"They might have come to that conclusion themselves you know, they're not stupid."

I know, it just needed to be said.

Taboo hummed but said nothing else as they walked back.

"I'm going to kill him!" cried Jamie one afternoon in March as he slammed the door shut behind him and made his way towards the lounge in his and Jackie's apartment.

"I need to know who you intend on killing before I can help you hide the body." Jackie replied as he came in, not looking up from the report she was reading.

"Jack Frost."

Now Jackie looked up from her report in surprise as Jamie sat down on the couch opposite.

"Why, what's he done?"

"He broke up with Sophie and she's heartbroken."

Jackie winced, she was somewhat glad that Jack had taken her advice, but at the same time...

"You know that relationship wasn't going to last right?" she asked him.

"Yeah, but did he have to hurt her like that?"

"I doubt he meant to."

"Doubt he meant to? He just left in the middle of the night!" Jamie cried. "No goodbyes or anything. They even had-"

"I don't want to hear it." Jackie cut in, flushing red, even at 28 (29 the coming June) she was still fairly innocent, especially about, that.

"Still, doing that the night they break up, and he just leaves. I mean, how could he?!" it was clear that Jamie was unlikely to calm down from this, he probably didn't want to calm down. His little sister had been hurt after all.

"I doubt he meant it that way. This is Jack we're talking about, he'd have tried to not hurt her."

"Still doesn't change the fact that he did."

The two looked at each other and realised that they weren't going to see eye to eye on this one.

"Let's not fight about this." Jamie sighed.

"Agreed. I'm sorry to hear about it though."

Jamie nodded, but the two fell into silence, not having much of an idea of what else to say.

There was a bit of snow that year, not much though, and none of it Jack's. That year Jackie could brush it off, chances were Jack was nervous about bumping into Sophie. That's what she told herself anyway, ignoring the uneasy feeling in her stomach for months.

It was the next year when she started to worry.

There still was no sign of Jack, concerning enough, even more worrying was Sophie now had a young daughter, and given Jack was the only person she'd been in a relationship with, it didn't take a genius to work out who the father was.

And oh boy did she take after her father, from what she'd heard, Sophie had refused to let her near her.

"Bloody stuck up..." Taboo grumbled about it as the two walked through the town.

Taboo...

"It's true, you're Jamie's girlfriend, why can't you see who could potentially become your niece?"

Jackie's face went a little red at the idea. Currently she's actually kind of my cousin. She corrected.

"Even worse! You two are actually related by blood!"

She's a half immortal, most likely with the same powers as Jack, and Sophie knows at least a bit of what I do.

"...Oh, yeah, there's that. Protective mom much?"

Not like we haven't dealt with them before. Jackie sighed. She was usually the one to approach newly found Descendants of Jack Frost, and a large chunk of the time the parents were not happy. Actually, a lot of them tried to kick her out, with mixed success depending on exactly how scared or angry they were.

"But as you said, she's half immortal, we can't really get involved here, can we?"

Not really, especially if Sophie won't let me near her. Maybe if I wait for Jack to get back...

But Jack didn't get back, not that year, and that's when Jackie decided to ask around.

She stayed up to ask both the Sandman and the Mini Fairies if they'd seen Jack. Every time she was met with a shake of the head and a worried look.

Before jumping to conclusions she checked the lake for her ice figure that she usually left Jack at Christmas. The one from last year and this year were still there. He'd never missed one, ever.

Jack was definitely missing.

She checked Antarctica, which is easier said than done given the size. No sign of him there. Next was the Arctic Circle, which took her another few weeks to cover and was still fruitless.

She could have checked the warmer parts of the planet, in case he was stuck there. However doing so would have been like trying to rescue someone who'd fallen in a well by throwing someone else down without a rope.

Out of options she watched the world wide weather like a hawk, and whenever a cold front was mentioned she was there in minutes. Still nothing.

For the next nine years.