During holidays I would come home and visit my family. My sister still lived there and being three years younger than me she did a lot of growing up while I was away. She filled out nicely and had a new confidence in herself. She had a few boyfriends and was pretty popular. Prior to her growing up she was never part of my masturbatory exploits but now she was. I would try to peep on her coming out of the shower and getting dressed with very little luck. What I did have luck with was snooping in her room. I loved going through her drawers and finding her lingerie or panties or other things she tried to hide. I would steal her silky panties and masturbate while wearing them. When she was 16 she had an older boyfriend who must have (thankfully) corrupted her. I found pictures of her naked. I was hypnotized by those images and still use them sometimes when I am horny and playing with myself today. Along with those was her vibe that I definitely spent some time playing with. Tasting it and rubbing it up and down my shaft. It is an amazing feeling to have that humming just under the head of my cock while cumming. I played a lot with it but found that full insertion was too much for me, but just a little was very enjoyable (a fact I experienced again with a g/f who would tongue my ass and masturbate me to unsurpassed explosions/orgasms).
Her room was extremely 'girly'. It was frilly and smelled like perfume. I also used to lie on her bed and call phone sex party lines and tell people what I was doing. I loved to talk to people while I was jerking off. It heightened the orgasms to have someone on the line that I couldn't see and that was there for the same reasons. There was no one judging me for what I was doing since they were probably into the same things and were definitely there for the same reasons. The danger of being caught also made it more enjoyable. I sometimes thought about what she would do if she walked in and saw me in her panties with my cock sticking out, a fist sliding up and down, her vibrator teasing my asshole and on the phone. What a sight that would have been! She is married now and I had the opportunity to house sit for her once and it brought back some old memories when I was snooping through her drawers again. She has some better lingerie (she still has a great body) and better toys. Her husband has a nice collection of porn and a nice selection of pictures of the two of them on his computer. Of course I emailed them to myself and enjoy them very much to this day.
She never caught me and has no idea to this day as far as I know.