Caught By My Young Neice

My wife and her older sister could be twins. They are both tiny ladies, very athletic, with short brown hair, small breasts and bright green eyes. They are both active runners. The sister, Trish, has an 18-year-old daughter named Krista. Trish got pregnant when she was in high school.

This summer Trish and Krista came to spend the weekend with us as she and my wife were going to run a 1/2 marathon. The plan was for them to leave the house very early in the morning and start the event and have Krista and I meet them at the finish so we could drive them back to pick up the other car.

I awoke in the morning alone in bed with a hard-on. I started to masturbate under the sheets but soon was so aroused I wanted and needed a very strong climax. Still not quite awake, I got up and went to my wife's underwear drawer where she keeps a her vibrators in a old 50s purse. I dumped it out onto the bed and took a large curved pink vibrator and the bottle of astroglide. My favorite method of masturbating is to hold the skin on my cock tight with one hand while slowly squeezing the head with the other one.

I kind of made the bed by smoothing out the duvet and made a nest out of the pillows to support my arms. I also put on an airline eye shield/blindfold my wife had in the purse. I held the vibe against the base of by penis with the tip just pressing on my ass, but not going inside while holding my balls and pulling the skin tight. Well lubed, I slowly started to masturbate again.

Twice I came very close to orgasm, but each time I stopped, let myself go semi-soft and re-started again. I was going to do this a third time, but I could not hold back and came hard. It was so intense I dropped the vibe and it slid off the bed onto the floor. Sitting up, I removed the blindfold was was shocked to discover Krista standing beside the bed looking at me with wide eyes. I had forgotten she was in the house!

I did not know what to say but Krista said she was sorry for coming in but the door was open and wanted to wake me up as we were getting late. She was staring at my cock as she asked me why I did this when I was married.

I answered that sometimes I get horny and need to masturbate even when her aunt was around. As I was explaining this I was looking at her body. She was only wearing some spandex running shorts and a tight t-shirt over a sports bra. I could see the outline of her cunt and her great breasts. She was like a young version of my wife, before we met.

I still had my cock in my hands and realized I was starting to get hard again. Krista sort of nodded to me as if she was giving me permission to masturbate again. I quickly got hard again and started to stroke myself.

As I did as series of thoughts ran through my mind; I wonder if she would let me fuck her, I saw myself fucking her doggy style on the bed, I wanted to reach out and touch her pussy which was only a few feet away.

Thankfully I came very quickly this time, releasing a pea-sized drop of cum.

Krista looked at it and said; "that's so cool!"

I got up , had a shower, put the sex toys away and we left for the running event. After a moment of awkward conversation, Krista just blurted out: "Don't worry, it will be our secret, uncle.", much to my relief.

I have never kept secrets from my wife about anything, including fantasizing about sleeping with her sister. but this was different. Since then, each time we make love or I jerk off, (both quite often) I tend to think of being with Krista. How do I deal with this?