[Even if she were asked to leave them be, she can't quite let go of her sense of responsibility for how this situation pans out. All the same, it almost feels beyond her to watch it like she couldn't hope to fully understand. If she had hopes of being the one to give some comfort, an apology for the agony her blood is causing... well that's definitely not happening.
So she'll stay near them but keeping silent, almost as if waiting. No matter what, she can't go without seeing this through the end where Ciel is concerned.]