Girl in wheelchair has a threesome with his adoptive parents

I Thought that living with my new adoptive parents, I would finally be given a normal life. But I was far from the reality. They seemed normal, but it was a family with many vices and a life that is very dirty. They already had other daughters, and did the same with them. Were their slaves and sex toys. Even if I was on a wheelchair, are not escape to that reality. In fact, I became their favorite because it was something new and generated a lot of morbidity. Then at night I had to go in the room with them and make a threesome. My stepmother helped me to do blowjob to my stepfather and then I had to make her oral sex. I brought it to the bed, and me humping between the two of them.