Until my dad married my step mom it was just the two of us. I didn't have any siblings until they got married when I got a step sister. I was seven at the time and she was 8. At first it was a little strange simply because I had never had a sibling before but soon we were like best friends. We did everything together. We liked almost all of the same things. When I was about nine we played "I'll show you mine if you show me yours". I don't remember how it came up but we both were very curious about the opposite sex. When our parents were gone we both took our clothes off and then just stood there looking at one another then put our clothes back on and promised to never mention it ever again and to forget about it. We continued to be like best friends and nothing like that happened until we were both about 12. It was at the time that I really started to notice girls. We were at home alone after school and she was in some short cloth shorts and a tank when I realized how hot my step sister was. She started to give me erections and I would try and hide them but one day she caught me with one. She asked what was going on and I tried to answer but she knew what it was before even asking. She asked to see it and at first I was nervous but eventually pulled it out for her to see. She asked me if her body made it happen and I said yes and she began to take her shirt off for me to see her breasts. For the next several months whenever our parents were gone we would look and touch each other. This soon died out with time. I began to get very attached to her and began to fall in love with my step sister. Over the next few years it was agony for me because I knew I loved her more than a sister but was also aware that it was out of the norm. I kept my love hidden until she started dating a guy in high school. I was jealous of him and felt like she was hurting and cheating on me. I hadn't dated anyone because I was in love with her. I couldn't take it. I talked to her one night and told her how I felt expecting to be met with conflict but said she felt the same way. She told me that the boys she had dated that it never felt right with them. We started "dating" you could say, when no one was around we would hold hands and kiss and everything teens dating do. Then we started sneaking into each others rooms at night after everyone fell asleep to lay with each other and then it happened, we had sex. We were both each others first. Every night possible I would go to her room or she would come to mine and we would have sex. We continued this throughout high school until we both went to different colleges and now I do not know what to do. I don't know where our relationship stands and I don't know if any of this should continue. Is it normal to fall in love with your step sister like I have?