My stepsister let me use her mouth

My stepsister and I were at home and we were just talking about different topics. The conversation turned to girls and guys, and then about sex. I said that I had never had a mouth and that I would love to try it. She was surprised because she had it many times and hey really likes it when she gets fucked in the mouth. She allowed me to use her mouth however I wanted. Thank you, it was amazing!