Penelope... My friend?

It was a windy day after school. Amy, Louise and I were hanging out, saying bad things about the popular girl group, chilling when we heard the doorbell ring. Naturally, we opened the door. We saw 2 boxes of chocolate. The really good kind that comes in a heart shaped box. And then we saw Penelope.
"Hello! would you like to buy... oh no not you!" she said as she shivered.
"Yes! My dad actually LOVES this chocolate! You look cold, wanna come in?" I said. She nodded. I gave her $20.00.
"Why are you selling chocolates on a day like this?" Louise asked her.
"I got grounded for putting a stink bomb in Weston's room."
I lead her to the fireplace and went to make hot chocolate. We talked and talked about school and boys until my dad came home. He asked us who was our friend. I told him she was from school and she was selling our favourite chocolate. Half an hour passed by the time she told us she had to go. Before she opened the door, her smile turned into a serious look.
"You'll tell no one about this, got it?"
We nodded. She opened the door with a giggle and left.