Watching for a little longer can't hurt, right?

You try to stay silent as you peer through the door. As they keep fighting you can't help but get a little aroused. All three of your sister's friends are hot, and even with her there with them you're turned on.

Katrina is about 5'5", only one or two inches shorter than you (you always were short). She's really petite and tiny, and when the other girls hit her too hard she falls back a little bit. Alex is hot too, but she's much taller than you or Katrina, about 5'10" and curvy to match. Both your sister and Lilly are a little taller and stronger than you, but not too much.

You must've gotten lost in your thoughts, because you didn't notice your sister see you peaking in. "Hey perv! Get your peaking ass in here!" Your sister rushes out and grabs you by the arm, pulling you inside the room. You fight back but she easily overpowers your scrawny strength. Your boner is clearly noticeable through your sweatpants and your face is blushing harder than it ever has. "Well perv, looks like we're gonna have to punish you."