Rachel lost the scalpel and shoved that power into shields. She expanded them to protect Stephanie's consciousness as well.

Well, this confirms Sinister. Freaking family stalker. Pull back, Stephanie. We've done enough for today.

She would rather not turn Miss Shaw into a vegetable taking out the mental booby traps. As much as she was loathe to admit it, Rachel needed help. Someone with more scalpel precision.