These accounts are true and happened many years ago when I was 16 years of age and my sister was 18. I have not really wrote down these experiences in detail before to anyone other than relate them to my ex wife who indeed found it to be a great turn on for her. Also I did not have penetrative sex with my sister but carried out almost every other sexual activity.
As I said I was 16 and lying on my bed looking at a women's catalogue depicting pictures of bras and pants for sale and wanking off to these pictures when suddenly my sister just barged into my room as she normally did but, on this occasion I was wanking. I quickly put my cock away as she walked over to me giggling and looked at the catalogue as she stood over me. I asked her to leave which she did and carried on giggling as she left my room.
Now I must admit I did fancy my sister as she had a lovely figure and dressed trendy for that time of era back in the seventies. I had never seen her naked but the clothes she wore showed of her lovely breasts, bum and legs. Anyway over the next couple of days she just drew me little giggles and generally giving me teases by flaunting herself at me which I remember being quite timid to it all. None the less I did sometimes fantasise about her as I had my wanking sessions between my sheets with my tissue paper.
Then one day my sister called me into her bedroom. I walked in and she told me to come over and sit on her bed which I remember doing so rather sheepishly. She then said outright if I liked to see women in bra and panties. I was getting all shy and did not answer her but she told me not to be shy as she was my sister and then asked me if I would like to see her in her bra and pants. I remember getting all excited by means of my cock stirring as I only had shorts on and she just turned away and walked into her walk in dresser. I sat there for a couple of minutes wondering what was going to happen when she opened her door and came out displaying her under wear. I remember sitting there just staring at her lovely body - her tits looked great underneath her bra and as she turned around her bum was great. My cock was getting hard again and she asked me what did I think. I blurted out something like she was great and looked really nice. She then done another couple of twirls and went back into her dresser.
I just sat there and readjusted myself to make me comfortable and once again she walked back in displaying another set and asked me what I thought.