Both

You decide to visit Abby. You take out your phone and give her a call to see if she is home, but it goes to voicemail. She does not live that far away, so you walk to her house.

You ring her doorbell and Abby's older sister Bethany opens the door. Bethany was medium height with perky B cups, curvy hips, taut ass and shapely legs. Her hair was dyed honey blonde and was pulled back into a pony tail. She wore denim shorts and a tank top that came down an inch above her shorts.

"Abby's not here," she said coldly. You and her never got along. She thinks Abby is too good for you. She and Abby argued almost every time you saw them together. Bethany was twenty-two and had flunked out of college once for partying too much and dropped out once. She worked selling cosmetics at an upscale department store.

You grip the book and think Three!

"Let me in," you say.

Bethany stands aside. She looks a bit surprised.

You walk past her. "Tell me, who else is home."

"Just me," she says, "Dad is playing golf, and Abby and mom went shopping for clothes. Abby probably won't be home for a while, so do me a favor and get out."

You look down. "Your panties are showing," as you see the top of her purple lace panties sticking out above the waistband of her shorts.

"Get out, perve!" she says, pointing at the door.

"Give yourself a massive wedgie," you command.

"Look, you..." but before she can finish, she starts to reach behind her. "What's going on?" she reaches down into her shorts and grabs her panties and starts to yank up. "What's happening?"

"Shut up," you say. "Do not talk unless I give you permission, and smile like you enjoy this."

A pained smile forms on Bethany's face as she continues to yank up the back of her panties as hard and high as she can.

You walk into the living room and sit down. "Stop and pull your shorts to ankles. Leave them there and come over here."

Bethany stops giving herself a wedgie and pulls her short down. She waddles over to you.

"You've always been a bitch to me," you say, "and that is naughty. Turn around, bend over, and smack your ass as hard as you can until I say stop."

With the smile still frozen on her face, Bethany turns around and bends over. Soon she is smacking her ass as hard as she can, leaving red handprints as she does.

You are getting horny now, and as much as you would love to roughly face fuck Bethany and ejaculate al over her or fuck her up the ass, you want to save yourself for Abby. You shift your erection to make it more comfortable and watch Bethany continue to spank herself. After her right butt cheek is bright red, you have her stop.

"You will not hurt me or Abby. You will not tell anyone you must obey me. Now, leave your shorts around your ankles and your panties up your ass crack and go get me a soda."

Bethany turns and looks at you. You laugh at the dopey smile frozen on her face as you know inside she is probably scared witless and feeling utterly humiliated. She waddles off to the kitchen and comes back a minute later with a can of cola.