BULGE!

“Mmm, yes! Hahaha!”

You heard laughter coming from upstairs. No doubt that was your sister. So, you got up and went to her room. When you opened the door, you saw her look very different from before. She was way more muscular and she had veins bulging from her arms to her face

Even her fingernails got sharper and longer for some reason. She looked at you from the left side and smiled

“Andy, don’t you know how rude it is to enter without knocking? I mean, I know you’re my bro and all but...”

She stopped as she groaned in pleasure from her biceps bulging with so much strength

“Ahhh... Fuck.”