There we go. She's got her well enough that the fight falls out of her, and that's at least a good start. But she feels too exposed here at the edge of the bath, so... as soon the struggles stop, one hand lets go of a wrist, the other shifts its grip to the girl's arm, and she pushes herself back.

Keeping what focus she can spare listening and watching for intruders--however much of her brain isn't currently wrapped up in a predatory haze--she moves away from the edge of the bath, out into the water. Just moving her prey a little bit, somewhere safe, somewhere she can really pay attention to what she's doing.