She sits down across from him and eyes his elaborate food unwrapping while considering his answer. It doesn't really sound like he can do what she'd need - she isn't looking for some nebulous general warding, she needs the assurance that she would have reliable additional protection against Gabriel if necessary. And Cecil seems to have finally picked up on that part.

"I don't want to target him," she objects unhappily, gaze cast down at her folded hands. "I... we were very close. But now... I simply don't know what to expect of him." He'd said he didn't want them to be enemies, but how much can she really trust him anymore? He feels threatened so easily, and he was only civil to the Doctor for her sake, so what happens if he changes his mind? These thoughts alone are making her miserable, darkening the mist outside the window.