My own personal fantasy
I have been dating my girlfriend for over six years and have enjoyed the time together. She is the same age as me but has a sister three years younger. Her name is Erin. Erin has a slender build and is quite sexy for being 18. She isn't shy either about her sexual explorations with herself. I have recently fantasized about her catching me masturbating because the thought of it just makes me shake from excitement.
One night as I was over my girlfriends house we were watching TV in her bedroom and I just felt the urge to want to masturbate. Now my girlfriend doesnt mind if I decide to masturbate in front of her since we have been doing it to each other for a few years now. So I decided to pull my penis out and start going at it. My girlfriends bedroom door was slightly open and I happened to notice something out of the corner of my eye. It was Erin staring into the bedroom staring at me. Her eyes locked onto mine as I layed on the bed and started to stroke harder. My girlfriends mother called for her to help her downstairs for a minute and I was left alone in the room.
Erin walked into the room and just admired my slow strokes as my dick grew harder than a rock with the sight of her staring. 'I have always wondered what your dick looked like you know, my sister never talked about it.' Now my penis is about 6' erect, and I know that I am a grower, not a shower, so I was surprised when she mentioned that.
Erin then asked in a quiet tone if I minded if she stood and watched as I continued to 'stroke away'. I was surprised that she was even standing there to begin with, I nervously shook my head and told her to 'be my guest, just be quiet about this.' She said, 'No problem'.
I continued to jerk away when suddenly she asked me if she could help me in any way before her sister came back into the room. Well with that, I nearly came instantly. I again shook my head since I was speechless. She grabbed the base of my penis and began to masturbate me like I've never felt before. She had to have been doing it for a while now and she was much better than my girlfriend at it. 'Does it feel good when I do it?' She asked. 'Uh-huh...' I murmured.
I knew I wasn't going to last much longer, then she said, 'I wanna watch you cum... I've always wanted to... do it.... do it now!!!' No more than 5 seconds later, I shot a huge load all over myself and some landed right on her cheek. She was taken back at how much cum I unloaded. Just as I came, I heard footsteps coming up the stairs. It was my girlfriend. 'Quick! clean up before she sees us!' I grabbed a tissue and did my best to clean Erin up before my girlfriend came into the room and Erin rushed out and into their bathroom.
As my girlfriend walked in she saw that I had cum, and was upset that I didn't wait for her.
Later on that night before I left, Erin gave me a kiss on the cheek and said that it would be our little secret and that she couldn't wait to catch me again.