The first time…
"Daddy…" A little voice squeaks as a tiny, pudgy hand gently shakes Dean's shoulder. Dean grumbles something incomprehensible and buries himself deeper into his side of the bed.
"Daddy!" The voice whispered, noticeably louder this time. Dean let out a snort before gaining a small level of consciousness to realize his daughter was speaking to him.
"What is it baby girl? It's," Dean looked at the clock. "2 in the morning."
"I had a bad dream." Dean looked at his daughter, who had the biggest pout on her face. Knowing what was inevitably going to happen, he sighed his reply.
"Do you want to sleep in he-"
"Yes, please." Nova interrupted. Dean chuckled. He rolled over and picked up the small child from beside the bed and hoisted her up beside him.
"Papa and I will keep you safe, 'kay baby?" Dean mumbled as he helped his daughter burrow under the covers. She snuggled up to him and Cas, the latter only giving a low grunt as his sleep was disturbed, before falling back to sleep.
"Good night, baby." Dean whispered.
"Daddy?"
"Yes, baby?"
"Can you sing me a lullabye?"
"It's a little too early in the morning for that, and we don't want to wake Papa up. I'll sing you one tomorrow night before you go to bed." Dean compromised. Nova studied him for a moment before answering.
"Okay. But you have to pinky promise!" She said as she held up her pinky. Dean scoffed.
"Well of course. That's the only way to seal a promise." He held out his pinky, to which she promptly wrapped her tiny one around. She smiled brightly.
"Good night, Daddy!" She giggled as she rolled over, snuggling into the sheets.
"Good night, my little supernova." Dean replied. It didn't take him long to drift off to sleep again.