You'll let me live on my own? [The shock is obvious in his voice. Probably pretty clear that Vash had thought that part was a non-negotiable item. He really thought it was more because Knives wanted a way to keep easy tabs and control over what he did each day.

Could it be that Knives just didn't want to stay in an empty apartment on his own? Suddenly Vash starts to rethink that living arrangement.] Of course I wouldn't bring anyone home. [He doesn't want Knives to know what any of his friends look like or who they were.] I just need you to not come looking for me if I don't come home every single night.

[Just as Knives tried to give Vash a chance to back out he tries to put himself back in. If there was one thing Vash understood it was not wanting to be alone.] Just... tell me if you're having someone over so I can find something else to do for awhile.