After mom and dad divorced we had to live in a small place with one bedroom and transfer to a new high school. Mom slept on the sofa and my sister and I shared the bedroom. There was a sheet between the beds but my sister used to pull it to the side while I was jacking off and watch. Then she would dance around in her underwear in front of me and ask why I wasn't playing with myself, wasn't she better than my fantasies.

Finally one night my sister crawled into my bed with me and jacked me off. She said she wouldn't tell mom if I didn't. My sister and I continued being sexual with each other without mom knowing. The next year my sister was in my high school and she told everyone that we were dating and the reason we had the same last name was because we were distant cousins. My sister and I started going on real dates together and now were sleeping in the same bed every night. Mom asked us once why the sheet was down and we told her we were adult enough to behave properly around each other.

We finally moved to a bigger apartment and my sister and I took the bedrooms that shared the same balcony. We still see each other when we can and really don't feel we need anyone else.