AMBI-166 Love my older sister fucking my younger sister

My mother remarried and I have an older brother who is not related by blood. I was worried at first, but then we got along very well and became closer than brother and sister. I often steal my parents' eyes and do naughty things with my brother, but this time, my parents will be away from home for 3 days because of the funeral. I'm really looking forward to three days with my brother!