Castiel had carried Jeremial in the fold of his wing all through egg and birth. It was a time-honored tradition for angel and nephilim, and practical too. It allowed Castiel to move and fight in his human vessel, while keeping the egg safe within another plane of existence. It had used to amuse Dean too; after a battle, he would pat Castiel's stomach and quip, "No one would know you were pregnant."

Castiel had never been able to truly explain to Dean where the egg actually was—at least without wanting to break out the charts. He got as far as "electromagnetic radiation" before Dean tuned out. "As long as he's safe?" was really the only explanation Dean needed, and that was an easy answer to give.

Now Jeremial was getting older and starting to develop his powers, and he had taken to returning to Castiel's wing when he was sleepy. He liked to cuddle within his own wings and doze away in the heat of Castiel's. Castiel had come to enjoy it too, taking comfort in the feel of Jeremial's breathing, the patter of his heart and the pulse of his energy.

The problem was that Jeremial, when he went for the wing, disappeared from the sight of a naked human eye. And sometimes Cas forgot that happened—forgot that Dean and the others couldn't see Jeremial how he saw him: past the black hair and green eyes and smattering of freckles on his cheeks, to the pulse of energy within him. He never actually disappeared from Castiel's sight like he did from Dean's, so he never had a reason to panic.

So on the day when Jeremial first sought out his wing, teleporting to Castiel in their room, Cas had thought nothing of it. It was to his surprise when Dean rushed into their room a minute later, completely panicked. His thoughts practically screamed, Where the fuck is the baby?!

"Oh, hey Cas," Dean said in his casual voice. His eyes flicked around the room; his thoughts grew louder. Bobby John, where the hell are you?! You know you're not supposed to teleport away on Daddy! Dean forced a smile. "How's it hanging?"

"I am well," Castiel replied, utterly bewildered. He looked back down at Jeremial, snuffling away in his wing as he twisted around in his sleep. "Dean, Jeremial is right—" he managed, only for Dean to cut him off.

"That's great, that's great. Well, I was just seeing how you are, I'll leave you alone now," Dean babbled, backing away from the door. His thoughts cried, Don't let Cas know you lost the baby! and Cas's call of "Dean, wait!" were lost. Dean was gone, his last fading thoughts, Oh god, Cas is going to kill me if I lose the baby.

Castiel had stared after him, very confused to why Dean hadn't noticed where Jeremial was until it hit him. Dean couldn't see Jeremial, of course. He looked back down at Jeremial, the baby lost in dreams of apple pie. "We'd better go find your father, hm?" he said with a smile, before teleporting off.