Make her get closer to her servant girl

"So many servants in this big house. But do you really respect them? I think you should get to know them a little better."

Moving in a blur you go find Evellyn's maid, who's name you think might be Polly. She's somewhere by the kitchens on the ground floor. You untie her bodice, unlace her apron, peel off her ankle-length gown and strip away her conservative undergarments, leaving her just as nude as Evellyn. She's a little plumper than the fit, muscular knight but it mostly shows itself in her pleasantly heavy tits and her curvy round bottom. You take the maid into a spare bedroom, then lift Evellyn out of the bath and carry here these as well.

You lay the girls on the bed, admiring their pretty paired nudity. Then you take out your special secret - a can of maximum-strength itching powder. You've used it plenty of times before. It produces an intolerable ticking, stinging, itching, prickling sensation, like a thousand tiny electric needles tantalising your skin. Girls hate it when you pour it down the front of their panties while they're sitting quietly in church, and they're going to hate it even more now. You dust each girl's tits and pussy with a healthy dose of the stuff.

You roll them over so they're lying face to face and tie them together, mouth pressed against mouth, tits smooshed against tits and pussy rubbing up against pussy. Their arms are wrapped around each other and bound at the wrists in the smalls of each other's backs. They're tied at ankles, knees, hips at chest. There's no way they can get free, but just to be sure you grab a big fur blanket and wrap them up to make an embarrassed-girl burrito. Their heads stick out one end and their feet stick out the other. You get your itching powder again and brush some across the soles of their feet, just for a little extra torment. Finally, you gag each girl with the other's panties and let time start up again.

"Hi, ladies."

"Mmf?"

"Mmf! Mmmf mmf mmmmf!"

"You should feel the fiery prickle of the itching powder kick in any second now. If you want relief, you're going to have to rub up against each other's naked bodies. Don't worry, though. It shouldn't be more than an hour or so before somebody finds you."

"MMMMF!"

"Of course, the itch can last all day. The only cure is to take a long bath in cold, wet mud." That's not actually true, but you'll let them find out for themselves. "Anyway, goodbye, girls. Have fun getting to know each other!"

You hop up onto the windowsill and exit the mansion, Evellyn's muffled squeals following you out into the street. That should teach her a little lesson about trying to fight you.