Lowering my sword will surely result in that girl's death. I cannot stand down until this woman leaves.
[It's not the meddling girl who is keeping the dark woman at bay with her useless firearm, and Saber has no doubts that the Servant will immediately finish Sasha off the moment she so much as relaxes. She has to keep up the main part of her focus on her opponent, even in the face of the troubling words said to her.
Unlike proper Heroic Spirits, Saber retains all her memories of each summoning, but this woman is not familiar to her at all. Then perhaps... from when she was alive, or like other Heroic Spirits before her, she's mistaken Saber for another person? She decides to accept the latter for the time being, not particularly having the leisure to think it over right now. Flatly:]
You speak nonsense. But if you truly believe I cannot stop you, then come at me once more!