My step sister is 6 years older than I. Our parents married when I was 13 and she 19. My father left us two years later. My step sister is gorgeous and I have always been jealous because I'm a femmy type but not able to do much about it until a strange quirk freed me. One day when I was 16 I got in trouble at school and the school called my house. My step sister got the call. She was "babysitting" me for the week while our mother was away. Whenever this happened to ether one of us we automatically received a strapping from our mother. I got home from school and beth was waiting for me. "The school called. You know what that means." "But mom's not here." "I know and I'm in charge. I'm going to administer the spanking you know you'd get from her." "So, get the strap and come into the living room and let's take care of this." I could hardly believe she was going to spank me but I had a different feeling than when it was our mother. I almost liked the idea. We had been spanked as children, over the knee with a wooden paddle. When we got to be teens it was bent over a living room chair with a strap, belt or switch over our underpants or bare butt.
So I got the spanking strap and took it to her. she told me to get ready which meant take off my jeans. I was really afraid to do that because I happened to be wearing a pair of her panties. I had been secretly wearing them as often as I could since I was 15. I was really afraid of what she'd say. "Get your jeans off fast and bend over the chair." I slowly took my jeans off. "Wow. Are you wearing panties.? Are those my panties?" I admitted they were and she said "we'll discuss this after the spanking. Now bend over but you can keep the panties on." I did as I was told. In a couple seconds she delivered the first of twenty strokes with the strap. It stung but was not unbearable. The big difference this time though was that as soon as she told me to bend over I started to get a hard on and it stayed throughout the spanking. When she was done she told me to stand up and go up to her bedroom because we had to "have a little talk." "And don't put your jeans on." I figured I was in for another spanking but I was wrong. "How long have you been borrowing my panties." I told her the truth. "I don't mind if you want to wear panties but you should really be getting your own." I asked if she would tell mom. "Sure because she already suspects it. I think one day when you bent over to pick something up she noticed the top of your panties over your jeans. She was just waiting for it to come out in the open.
"You can wear mine until you get your own."
"And another thing, did I notice you had a boner after the spanking?" "Don't be ashamed to admit it because I'll be honest and tell you that my panties got very wet while I was giving it to you."
That started it. I started to become her own personal submissive. Whenever I needed a spanking she volunteered to give it to me and our mother never caught on. I always got very hard. Soon enough she had me take my panties off and kneel on the bed so she could see my hard cock. One day after she was done she asked me what I did after the spankings from her. "You always have a very hard boner so what do you do to take care of it." I told her I would go to my room and jerk off. "Why don't you let me watch." I didn't mind the idea because we were already into a fairly kinky relationship. "Do it now." So I pulled my pink panties back down and started to stroke my cock. It didn't take long before I shot all over including on my panties." She loved it and as a reward she let me wear a new nylon thong she had just gotten.
She helped me buy lingerie and when our mother was gone she'd have me wear a collar and leash around the house. Another big breakthrough was halloween when I was 18. She decided I would go as a girl which, as she said, was not difficult since "I've always thought you were too pretty to be a boy." By the time she was done with the makeup I looked really pretty. She then helped me into a red lace dress under which I had a bra with breast forms and matching panties. I put the heels on and she looked at me and decided something was wrong. "You need nylons." I couldn't wait. She gave me a pair of her pantyhose and had me put them on. I loved every second of it and when she was done we really did look like sisters.
Our relationship stayed close and was actually a dom/sub relationship. I've loved every inch of it.