Comfort her.

"It's okay, Mom," you say. "Whatever's in the water here seems to have that effect on everyone. It's not your fault."

She sniffles. "But I even lied to Mr. Anderson about you. I knew he wouldn't let me come with you if he thought you were a likely candidate for the Process, so I exaggerated and made it seem like you couldn't possibly transform. You have to believe me, though, that I didn't think you really would."