Prompt: I can go for a billdip with dipper waking up on the could winter mornings with bill keeping him warm ! Just some cute fluffy stuff

I actually really needed this after the day I had. Fluff warms the soul.

Lullaby

Winter had come to Oregon. This wasn't unusual, it was December break, and the twins were spending it with their Grunkle (after much begging and pleading to their parents, who never quite understood their children's fascination with the oldest family member.) So, no. The act of snow falling was rather normal for a boring December the 20th, on a very boring Tuesday morning. Except of course, when you factored in the addition of ice fairies floating about crafting thousands of flurries a minute, each and every one unique, then, yes. Things got a little less normal, and a little more Gravity Falls.

With the fairies doing the work as if they were the busiest of bees, the snow fall came rather quickly. All in one night in fact, and with it went the temperature, which dropped so low so quickly the windows were frosting over and the old shack was moaning eerily from the wind rushing over it.

Mabel Pines was already up and on the first floor, making pancakes with her Grunkle's help (read: he was adding too many chocolate chips, and she was doing the flipping) and they'd already built a fire in the hearth down there.

Up in the attic however, was another story…

The thermometer read a whopping 2 degrees. The window was faulty, the latch letting small breaths of chilly air as if from Jack Frost himself. And not the teenager in the blue hoodie, no, the twins didn't mind that jokester. This was far too cold to be healthy for humans. It didn't quite help the shack had no insulation. Right now, Stan was having to use a hot air dryer to break the plates apart from where they'd frozen together in the cabinet.

But Dipper Pines was not aware of any of this.

Currently, he was in cozy, warm bliss, and had no idea why.

He awoke slowly, reluctantly, and buried his nose deeper into his pillow for a moment, curling up a little tighter to fend off awareness and convince his brains for a few minutes more. Just a few minutes more of this wonderfully warm, comfy, heavy, purring—

What.

Dipper's brain jolted awake as he tried to sit up. He failed superbly, because it was impossible for someone his size to move the weight that was a human-demonic Bill Cipher.

Who was folded over him on top of the comforter, like a giant cat, his huge wings mantled.

And he was purring.

Loudly.

"B-Bill! Dude!" Dipper pushed at the demon's large body, one hand on his shoulder and the other his side, trying in vain to move the demon off him. Dipper would have better luck getting Mabel out on another date with Gideon. And any effort he made at all, like when Bill's white shoulder moved, the demon would just flop back in place with a simple shift, snoring round his pointed teeth as he moved back into his position.

Oh, there was so many things wrong with this, just what the heck was Bill thinking?! Crawling on top of him like this! For one thing, he could be crushed. For another, Stan would hang the demon by his horns if he walked on this, and another thing was…

Was that this was really warm. And the air he'd been trying to get out into was decidedly not; in fact it was nothing short of freezing. Dipper took one look at the iced over window and didn't even want to think about what the hard wood floor would feel like at this hour in the morning. The mere thought of going into the icy, biting world when he was in fact sitting under the world's greatest heated blanket seemed ridiculous. The cold looked less promising when he tuned in on that soft lulling purr Cipher was doing instinctively in his dozing. It was…sort of cute. For an unhinged, murderous demon anyway.

The kid shivered quietly. Bill shifted a fraction, but slept on.

Dipper moaned in defeat and rubbed his face tiredly. He leaned back into the mattress, and realized his legs had moved under a little open cavity caused by Cipher's curled up form. Eyes widening, Dipper scooted down a bit, finding enough room to lie without feeling like he was being pressed right through the bed frame. This explained how Bill got away with laying down onto of him sometime in the middle of the night, and Dipper hadn't woken from the sudden pressure. Sneaky dream demon. The warmth only got stronger, and Dipper heard a faint whisping noise that was the demon's hot white, star-like center.

Bill had his wings out probably to keep the heat in, which they were doing rather well. Dipper was a little confused that their demon was in a mode he voiced against quite often. Cliché, heavy, impossible to fit through most doorways like this, among other things Cipher had commented when Dipper asked him why he was his little triangle shape more often than not.

Right now though, Cipher wasn't in his easier mode. He'd gone to all the trouble of changing forms into this one, and now here he was, lying on top of Dipper's bed like the world biggest (and laziest, Dipper mused affectionately) cat and purring to boot. This was too good. And Dipper had a feeling he knew why Bill had gone to all this trouble in the first place.

Dipper glanced over at his sister's bed, which still held the only heated blanket in the shack, given to them by Stan, to Dipper. Who in turn had given it to Mabel, saying she'd need it way more, Waddles or no.

Bill hadn't said a word last night when they'd had this conversation, but now Dipper knew why.

"…you're such a sap." Dipper whispered, but it was fond. Stifling a yawn as he pulled his blanket back over his shoulder, Dipper rolled onto his side under the demon's tented wings and tucked up body, right where the heat was. He drew his knees up a little, body fitting in the pocket of brain-melting heat created by the demonic entity's sheer presence. (No place hotter than Hell, of course.)

He faced the wall and soon his eyes dropped close, and Dipper fell back to sleep.

Only then did Cipher shift, moving to rest his chin on Dipper's shoulder, his throat pressed into the boy's arm.

The purring got louder, and Cipher's lips turned upward. Just a bit, and the two slept on.