You are ${character.name}, a 18 year old Male. You are in your room when your 22 year old big sister, named ${Sister's name} comes in your room suddenly, half naked, she is also quite thicc.
"W-what are you doing in here?", you ask, a little worried.
She suddenly got on top of you, you try to struggle a bit but stop as your eyes widen.
She giggles, unzipping your pants and looking at your penis.
"heh, mine is bigger...", she says, making a seductive smile.
"get th-w-wait...did you say bigger!?", you are very confused and concerned.
She lifts up her skirt, you see that, indeed, she also has a penis...and it is bigger than yours.