Struggle and try to break your arms and legs free

"Looks like we have a naughty girl on our hands. I'll punish her, girls." Alex walks over to you and kicks you in the nuts. While you're cringing from the pain, Lilly sits down on the bed next to you and drags you, face down, across her lap. "That was a little harsh, Alex. I think a simply spanking will suffice." You feel her pull your sweatpants down, exposing your bare ass, and smack it hard about ten or fifteen times. Even though you're embarrassed beyond belief, you can feel an erection growing. You hope that they won't notice, but right as Lilly stops spanking you she sits you up on her lap, saying, "Look girls, she got hard from the spanking! What a dirty slut you are Mark."

"I don't think we can keep calling her Mark, that's a man's name." Katrina walks over and looks at your erection, "How about Marcia? That's much more fitting a girl like you, don't you think?" You don't know how to respond so you just try to avoid eye contact with any of them. Marcia grabs your penis and starts stroking, saying, "I think that punishment was a little harsh, just be a good girl from now on and we won't have to spank you anymore."

"So, let's start playing dress up with Marcia, shall we?" Your sister walks over with a razor and some shaving cream. "First thing we need to do is shave your legs and sissy parts, so we can make them nice and smooth." They carry you into the bathroom and pull all your clothes off, then start shaving your legs. After they finish that, Katrina starts shaving your balls and dick, leaving a little landing strip above it all. Meanwhile, Lilly shaved your ass and in between the cheeks. They carry you back to Amanda's room and set you back down on the bed.

"Now that your legs are all silky smooth, we need to start dressing you up. Underwear first. We'll even let you choose Marcia."