This whole story started when I was masturbating one day, I do have a lock on my door but my sister, (17) found my spare key above my door so she sneaks in and catches me in the act.
I didn't really notice her at first but when I did I tried to cover myself up but it was no use. I asked her what she was doing and she said she thought that I might need help. So she closed and locked the door and got down on her knees and started giving me a handjob.
It was one of the best feelings ever, because I had never had anyone touch me or give me a handjob. Soon I came and she cleaned me up but I asked her if I could see her do it as well, and she said yes!!
She went and got a dildo from her room and got onto my bed and started going at it. Soon she was moaning and then I stopped her and asked if I could help her, she said yes.
I started fingering her and she came. She said it was one of her best sessions ever.