If I knew.

"I liked it a lot." Barry smirked, wiping away some of his release from Killian's cheeks, kissing him softly.

Killian smiled, and as the weeks and months passed by, his smile only grew when he looked to Barry. He loved the man. As what he did not know but he loved him dearly and he knew he always would.
Barry was so special too him.
Late one night, he had woken from a nightmare, and curled himself close to Barry's chest. He did not cry, but he wanted too, and he only calmed himself by petting Barry's hair.

Barry seemed to sense that something was wrong with Killian, slowly forcing himself to wake and look over at the young child.
"Killian?" He murmured tiredly.

"Ah love ya." The small boy whispered into the dark of the room, his face pressed into the crook of Barry's neck as his tiny body shuddered.

"I love you too baby... what's the matter?" Barry tugged the boy to lay on his chest.

"Ah jus....Ah don' ever wanna leab ew. Ah lub ew." He nodded his head, he had dreamed of being taken away from Barry at it was the scariest thing in the world to him.

"Okay darling, don't worry. You never have to leave." Barry whispered in the boy's ear.

"B-But what is someone takes meh from ya? Ah don' eber want ta leave ya." Killian shook his head vehemently, clenching his eyes shut.

"Shhh, no one will take you away Killian." Barry cooed, reassuring the boy. "I won't let anyone. Don't worry."

"P-Pwomish? An we ish donna det mawwied?" Killian's large blue eyes bit through the darkness, imploring on Barry.

I promise baby. I promise we'll get married." Barry nodded at Killian, kissing him softly.

Killian returned the kiss. He had passed his fifth birthday, and even though he was still so young, he didn't mind kissing Barry anymore. He even liked him. "When tan we det mawwied?"

"We can get married as soon as you're a little older." Barry nodded at the boy, stroking his hair.

"How much ish ah little?" Killian asked Barry, reaching out to place his hands and either one of Barry's cheeks, pushing on them to make him do a fish face.

Barry laughed softly, speaking in a muffled voice as his face was squished.
"I don't know. I'll tell you when you're old enough."

"But Bawwy! I want ta doh et swoon!" The child giggled as if he had no other care in the world "And you ish a duppy!"

"It'll be soon, just wait." Barry chuckled, nodding his head. "And yes, I'm a guppy." He winked.

"And duppy's dont smile!". Killian continued with Barry's cheeks, hoping he would repeat the words.

"Guppys don't smile?" Barry arched an eyebrow, humming to himself as he watched Killian's hands.

"But ya do!" Killian enthusiastically, his laughter thundering through his chest as he pressed on Barry's face. He was so innocent it was heart aching.

"But I do." Barry repeated with a chuckle, fighting the huge grin threatening to appear on his face. Killian was adorable like this.

"Now smile Bawwy!" Killian's were were alight with excitement. This was his favorite part if the guppy game. He found himself pressing just a little more on Barry's face in anticipation.

Barry broke into a grin at the tinier boy, waiting for what the boy was anticipating so much.

Killian let out a delighted squeal, his smile so wide it hurt his cheeks as he vibrated atop the mans chest. His eyes were shining with pure bliss. He truly was an adorable child.

Barry laughed, pressing Killian tight to his chest. Killian was the most precious thing he'd ever seen. He adored the way the child grinned and vibrated with happiness.