Go for the girl

You say, "Hello. Trish told me I could let myself in."

The girl stands up and walks around the couch. You think that she looks familiar but you're not sure who she is or where you may have seen her before. You thought that Trish was the only person here that you knew.

Then the girl smiles and says, "Hi, John! Trish told me you might stop by."

She grins and says, "You don't recognize me, do you?"

"No. I'm sorry. Should I?"

"I'm Trish's sister. Amy."

You apologize again for not recognizing her. You briefly feel like an idiot for not recognizing your best friend's younger sister. But then you tell yourself that it's understandable because Amy has changed a lot since you last saw her. You estimate that it's been about five years. She has really grown up a lot.

Amy is about 5'7"(more than a foot taller than she was the last time you saw her). She has an extremely cute face with very pretty blue eyes and a wonderful smile. Her gorgeous long blonde hair ends just above her tight butt. Amy is wearing a black sports bra and a pair of hot pink silky shorts. She has perky breasts which you estimate to be about 32B and a faint hint of a six pack. And she has beautiful long legs which are shown off very nicely by her very short shorts.

You try to think of something clever to say, but settle for, "So you're rooming with Trish?"

"Yeah. We transferred here at the same time and my parents wanted me to share a room with Kristen. Guess they thought I'd get into trouble on my own."
She giggles and you think “Damn, she's adorable.”

Then Amy casts her eyes downward. You follow her gaze to find that she's staring at your rigid 7" cock. You look back up at her face in time to see her lick her lips. Suddenly, you remember that when you first entered the room, Amy was moaning your name. At first you thought it was just a coincidence, but now you're sure that it wasn't.

Your best friend's little sister wants you. You're very tempted, but you wonder what would Trish think.