I [M] accidentally walked in on my sister [F]

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I just turned 18, she is 19 and at college. Right now, she’s home for winter break because her school has a really weird schedule.

While she was gone, I could just walk into the bathroom without worrying she had been there. Before, I would have to knock and she would answer. The first couple of days I made sure to knock every time, but this morning I woke up tired and my head was in a different place, so I just opened the door.

My sister, completely naked, was posing in front of the mirror, taking selfies. I had a plain view of her tight, round ass, no tan line to see on her bronze bottom. Her long legs looked gorgeous, and her muscular back was soooo attractive. I could feel my dick growing harder in my boxers as she turned around surprised, rushing to cover herself before I caught a peak of her bare B-cup tits.

Her face was stuck with her mouth open, in shock, as I stood with my mouth open, in shock, and a raging erection clearly visible. We were both trying to figure out what to do, and finally I broke out of my frozen state and said, “I’m so sorry.” Turned around and shut the door.

I was in my bedroom pacing, thinking about what had just happened. I couldn’t get her ass out of my head and my 7” cock was rock hard. Deciding on a course of action, I reached my hand in my pants and started jerking off to her ass. In my head, I imagined over and over again what I’d do to that ass. What it would feel like to grope it and feel it.

After only a couple of minutes I was ready to cum and I grabbed some tissues to cum in. It was the biggest load I could remember having, and I was exhausted. After half an hour or so, I knocked on the door to the bathroom, and with no response I went in and took a shower.

Nervous to see my sister after this, I walked downstairs to eat breakfast. She was already there, and avoiding eye contact I poured milk into my cereal. Eventually, I snuck a look at her to see if she was angry. Unfortunately, we made eye contact, and then we locked eyes for a few seconds until she smiled and winked at me.

Now I’m writing this, and I have no idea what to do.

Source: reddit.com/r/gonewildstories/comments/a2fxaf/i_m_accidentally_walked_in_on_my_sister_f