Night time fun

So my parents were out of town for the weekend, and my sister had just fallen asleep. I sneaked into her room, and luckily for me, she sleeps in the nude. I stuck my head under the covers and started licking her pussy. There was a soft moan, and I kept going. Over and over, until she finally orgasmed in her sleep. I was so hard at this point that I started masturbating, while licking her down there still. Eventually, I felt I was ready to burst, so I blew my load right on her face.

She woke up the next day and we watched Teletubbies.