After a bit

You use the mind control function on both Aimee and Madison to have them each think Lisa being humiilated or humiliating herself is hilarioius, and you have Lisa get more and more turned on by anything humilating that happens to her.

"Tell you what Madison, go over to Lisa and pull her panties to her ankles."

"Oh my god, that would be so funny!" Madison says before she walks behind Lisa, reaches up under her skirt and yankes down her black thong to her ankles.

"Buck-awk! Buck buck buck!" is all Lisa can do.

"Aimee, I think Lisa needs a make-over," you tell your step sister. "Go get your make-up and see if you can give her a unique look."

"Awesome!" said Aimee.

Lisa is getting more freaked out and horny.

You take Madison's hand and lead her to your room. She looks around her room, and when she turns her back to you, you admire that firm spankable ass. You now have a raging boner.