Tony had been a gift back then, before she knew what it was to have a place to belong, when she felt like she'd lost everything. Not just Gamora, but also Thanos, without him it had felt a little like she had no purpose - for so long she'd worked for him, and then she had devoted herself to his death and with him dead she could have so easily lost herself in this new world that he had left behind before he'd been ended by the Avenger Thor.
"She is my family." Nebula said simply, Morgan Stark had been tiny and different and new and she hadn't fully known what to do with the small bundle when she had met her for the first time, but watching her grow, coming back and seeing her a little bit bigger each time she visited had been a wonder. Nebula could say with absolute certainty that she loved the girl. "Of course I will protect her, to the very end." She promised, though it was not something that needed to be said - Tony Stark's family had allowed her the space to learn how to fit into something like that again. She would do the same for any of them.
"I am sorry you have not had the chance to meet her." Nebula said after a moment, "She has your hair."