Stretching Sis Out In My Dreams

My Sister Alaina is so hot, I love to watch her stretch out, she is always doing it in the living room. Today as I was spying on her she saw me peeking through the day, Aliana comes in and askes me to help her stretch out. Finally, I get to touch my hot sister, I want nothing more than to fuck her. I actually thought this was it, I can not believe I am gonna fuck her... or is this all just a fantasy.