Your sister

You've always had a crush for your sis. After all she wa the first girl you used to see naked as she grew up
You were very close, and it was easy to enter her rom and finding her naked. She didn't really care about covering herself at the beginning. She also entered your room several times as you were naked and, sometimes, seeing your cock getting hard (mostly due to seeing her) she even caressed it for a few. Later, due to your parents speaking with her, she always made sure to lock the door and to call before calling. Either ways, you never forgot those times as her body was getting sexier.
You find yourself in your room sitting on the bed, back from your experience and wonder how to start the changes