Vash made a point of having breakfast with his brother. Knives was so unhappy with their living situation that it was only fair to set aside some time for just them.
"You need to get rid of the girls," Knives groused.
Vash sighed. "So you keep saying."
"It's true. They're human; they'll do awful things sooner or later."
"They'll put laxatives in your donuts."
Vash barked a laugh. "Why would you say—" He stopped laughing, eyes growing wide. Knives looked innocent as Vash stared at his half-eaten donut.
Knives was banned from the kitchen after that.