Gamora doesn't answer right away. She can't really. She doesn't know how to stop calculating and assessing everything. Now really isn't the exception to that. "I have brought the only home I know to your planet. I have allowed you access to what I hold dear. I have also asked you to do this favor for my captain. What do you think?"

She trusts him enough to do all this. They'll see if she can trust him on the battlefield when it counts.