My sister started having s** when she was 13 I was 15. We were alone a lot bc both parents worked and we lived in a very remote area with no close neighbors. We never thought about her getting pregnant and we just did it a never thought ove 3 years we got better and better at it. At 18 I joined the armed forces for 4 yeaars and she got married and had a son. She divorced while I was still over seas.When I was discharged my parents had moved south and she told me to come live with her til I figured out what I was going to do. The first night there we laughed and talked and had drinks. At some point my sister ask me how the hell did you not get me pregnant. We have no idea.When we got ready for bed she said your sleeping with me. I said are you sure? She said after all you were my first. We slept togeather and had full blown s** until I found a job in another city and moved. We still get togeather a couple times a week.I love her