Chapter 38:
Milly can no longer keep silent. She has stayed out of the way for her daughter's sake (the daughter who looks so much like the father) but now she can't keep silent anymore. She sees Knives' dilemma and knows which of two ways it could go. She's seen it before between Vash and Meryl, but their love was unstoppable and Vash was not afraid to speak of his feelings.
Knives is stubborn, but one night Milly holds her breath as she trespasses into unknown territory and confronts Knives about it. In twenty minutes she has given her piece of mind.