Kristy is standing there..

You open your eyes, see his sister standing two feet away from you and her brother.

Kristy looks like a Hollister store model, pink crop hoodie revealing a bare tan belly and small denim short shorts revealing all of her trim tan legs. But from below her blonde bangs, her blue eyes are big as saucers as she takes in the spectacle before her. She drops the bag of groceries to the floor near her sandalled feet, the contents spilling all over.

The shock of her entrance and the awe of her perfect, sweet smelling body so close to you sets you both off simultaneously. Cum jets from the cock you still hold and splatters down at your face. Your own excited cock fills her borrowed panties with your own big cumload as you kneel there.

"Eeewwww!" squeals the teen, backing away.

"Kristy, I can explain," tries Richard, his cock still in your hand.