Sister doesn't know, I wanted this more than her

Late one night my sister brings me into her room. She lays me down and rubs my PJ pants. She tells me to keep quiet, Mom and Dad are sleeping. Her robe comes off exposing her huge boobs and she smiles as pulls out my pecker. She asks if I was okay and then began to suck. Licking and kissing all with a smile on her face. She rubs my head with her thumb and I explode in her hand. What my sister does not know is, I wanted this more than her!