Surprise!

As Mary licks off the last of your cum, you hear "Ahem!" from the doorway. Looking up in shock you both see her younger sister Katy, a petite elfin girl with short, almost spiky black hair, and a great bod for her size, wearing a white t-shirt, jean shorts, sneakers and ankle socks which read "I love you!" around the ankle.

"Well," says Katy, "It seems my sister has a new boy toy to play around with. I wonder what mom would think of this?"