You give your best "exorcism" performace

The village elder has dutifully assembled all of the girls in question for your ritual. Your court chaplain offered to help but you declined, ostensibly because you needed a capable churchman nearby if something happened, but really it was so he couldn't call you out on this bullshit. You even went so far as to bring your family's reliquary out to "assist" in your effort.

You look down the line of girls. Most of them you don't know, if fact the majority of them you've never seen before (though you have apparently "known" them). As you approach one of the girls giggles, earning her a sharp reproach from the elder. He slaps the girl's hands away from her mouth vehemently. "Be quiet, devil's concubine! Our master is taking time out of his busy schedule to help us, show some respect!" The girl goes quiet. As you look at the group, you have to admit they aren't bad looking for a bunch of simple peasants. Not that they're all the world's greatest beauties, but it's a little late to get picky. You see the girl from last night, who avoids your gaze. Looking further down the line you see Kesa, who looks bored. You catch her eyes and stare daggers at her silently, but she only shrugs at you. Blasted girl.

"All right, I'm ready to begin" you say, standing as tall as possible, hands on your hips. You've dressed up for the occasion, something between kingly robes and a cardinal's garb. You figured the best way to do this was to go all out, hoping your audience would be too ignorant to see through your ruse. Exaggerated confidence might help to stall the doubters; at least you hope so. You have your servant bring the reliquary up to you, meanwhile you open a document on exorcisms you had in the chapel library. It's old, faded, and damn-near illegible, but they don't know that. You start at one end of the line. Carefully, you take an old bone from the reliquary in one hand, scroll hanging down in the other. You wave the bone in front of the girl while chanting what you can read from random parts of the scroll, making it up where you can't. You raise your tone near shouting levels. At the end, you tap the girl with the bone in her stomach. "Is that all milord? So simple?" the old man asks. "Aye" you say, working to make something up on the fly, "Because the demonic forces are at work on a fetus, they are much weaker and thus require less effort. If it were the girls themselves possessed, more would be necessary." He nods his head, accepting your sage counsel.

You repeat this process with various relics painstakingly, one by one. Mouth getting tired, you reach Kesa. "You and I have to talk" you whisper through clenched teeth. She tilts her head like she doesn't understand, but her smug smile says otherwise. Sweating from the sun, jaw overworked, throat sore, and arms tired from holding the scroll and waving bones and other preserved body parts about, you finally finish the last girl's "exorcism". The girls look relieved to not have to stand around any longer, and you can't help but agree. "Thank ye so much milord, a better king there is not!" the elder says, shaking your hand vigorously. "Of course, it is nothing. I have weakened the devil's grasp on the children, as such they are now normal human babies. But do not allow them to breed with one another, as, uh, they are still more susceptible than average to the dark arts, and any spawn of theirs might be deformed as a result." The old man nods frantically, practically bowing. "So wise! What would have befallen this village without ye?!"