My sister asked me for help

My younger sister 19 asked me to help her fit in at college, she was being called Nerdette and other degrading names. I was on the football team had a lot higher profile compared to my sister. My sister has always been shy around strangers and so college was nerve racking for her. She didn't dress to impress, showing little or no skin and wore thick glasses. At first, I was too busy, then I came across some boys teasing my sister and I got angry at them. It was the first time I saw what she was going thru and when I told them to leave her alone. They thought they would take me on, but several other of my teammates appeared and they lost the will and ran away. After that day I'd my sister with all the time when we weren't in lectures. She still dressed the same way, but she got to know the football team players and the cheerleaders. She didn't fit in but at least she was welcomed, and she became friendly with all. So, she could tag along and being seen with the group she wasn't teased as much, especially if one or more of the group, were around. On a break from college and our parents away and I decided to try and change my sister's look. I asked did she have any clothes that improved her look. She didn't, so then I decided to see if I could make changes to her dress style without having to buy a whole new wardrobe. Going thru her clothes I found a bikini never worn by her a gift from our parents, had her try it on. Wearing it gave her a sexier look but made her very uncomfortable. So, she changed clothes mixed and match different things trying to find something that changed her appearance somewhat. Each change led to her not leaving the room to actually change. She just stripped down to her panties and bra and put on something else. I finally suggested she change her panties and bra to just a plain single color like just or black as long as it was just one color not many different colors. To my surprise she stripped completely naked and change her underwear in front of me. It was then I realized my sister was actually sexy as I got an instant hard-on. I've always been a positive type, if I wanted something I would have try at getting it. Not wondering about should I, I would go for it straight away. So, I made a move on my sister and soon had her on her bed kissing her and she started kissing me back. Once thing led to another and my sister lost her virginity to me that afternoon. Not that I stopped at just the one fuck. Back at college her dress sense had matured somewhat, not she showed much more skin. But she'd a lot more confidence, she wasn't the nervous virgin anymore she was my lover. Not that we mention our sex life to anyone, it was still secret. But feeling sexually attractive improve her self-esteem a great deal. I finished got a job in the city and on my sister finishing she came to live with me, straight back into my bed. Our parents were happy she was with me in the city and hadn't thought that we were lovers, just a close brother and sister. With the passing of our mother (car accident) we became even closer if that was even possible. Our father went downhill after his beloved wife death and his health failed and he too was gone. But we had each other and so we started our own family together. After 30 some years 4 healthy children and 7 grandchildren we are still happy to be together and regularly fuck. Never regrated our sexual relationship for a minute.