A/N: The first time Rosa calls Deeks dad.
The first time it happens, it's not planned out or some moment of particular significance. It's about two years since they adopted Rosa, and Deeks is dropping her off at college since her car has a flat tire.
"You got everything?" Deeks asks, watching her grab her backpack, water bottle, and phone.
"I think so." She frowns, patting down her pockets, and nods. "Yes, I do."
"Ok, I'll pick you up at 4:30 by the fountain. Do you want me to pick you up something to eat? I can swing by the sushi place around here."
"That would be nice," Rosa says. "If you have time, maybe we can eat in."
"I like it. Too bad Kensi's busy all day because she's going to be so jealous," he anticipates, and Rosa nods, laughing softly. "Alright, I'll see you later, Rosalie. Have a good day and call if you need anything."
"I will. Thanks, dad."
She's almost out of the truck when Deeks registers what she just said. He stays frozen, not sure if he should respond at all. It was probably an accident, a slip of the tongue. Then she turns around, her eyes a little wide and shocked.
"I—"
"It's ok," Deeks assures her quickly.
"No, I—see you later, dad," she says, repeating the last word with purpose.