This sounds like a bunch of magey bullshit to Teren, but she'll endure it. As long as Bethany isn't possessed. Then she will... quickly find herself far dead.

"Sounds like a bad reaction," Teren guesses, "stay right there a moment." She goes out to pull the kettle off the fire, pouring some boiling water (boiled from snow) into a nearby cup filled with leaves. Mostly she's just using remedies for sleeplessness, since it doesn't seem there's much else to be done for this.

She hands the tea to Bethany on her return. "Drink up."