Dad had gotten mom pregnant and he had my sister and myself one year apart. After my birth, dad divorced and that was the last our family ever saw or heard of him again.
Mom was thirty-six and had a fantastic slender and trim figure. Her height was 5'11", she had size 34" tits. This I had seen from her drawer, as I used to often jerk myself off, by thinking of mom's beauty.
My sister Carol, was the same figure but only more pert and she could be best described as an exact duplicate of mom. Her height and her tits were exactly the same. Carol was nineteen, and was in college, but according to mom, and was studying medicines. Carol always dressed in the most modern clothes and most of the times, this would include only an almost clear halter neck, and jeans which she had cutaway. Therefore Carol could only wear a light bra, on the odd occasion when she actually wore one, and always wore only g-string panties.
Mom insisted that she must not listen to any false promises made to her by boys, as they always seemed to renege, on them.
I on the other hand was still in high school doing my grade 12.
I would still jerked off regularly but would always try and be discreet, about this. My sister Carol very seldom, came into the equation, as she was my sister, and what can one say about a sister one year your senior. Obviously after her reaching the age of eighteen I then started to become attracted to her, and would jerk off, with either mom or Carol my being my fantasized objects. At school there were other girls, but they never attracted me as much as mom, or Carol.
One afternoon, after I had returned from school, Carol greeted me at the door, and told me about her oncoming exam, and she had specifically missed her lecture, so as to learn for her biology exam.
I was feeling exceptionally horny and so left Carol to her studies and went to my bedroom, and went ahead and had my usual fantasy, of mom, and how I would see her naked, and her beckoning me to come forth, and she would teach me the finer art of sex. With this in mind I immediately came, on the wall, and thus began my cleanup operation, to eliminate all telltale signs that may emanate from the smudges on the wall. Just as I was getting my pants on, Carol stepped into the room, she may have been knocking on the door, but I was too absorbed in my actions. She looked at the wall, and all around the room, and finally her eyes began to rest on my flatulent cock, which had just been giving me my pleasure. I never compared my cock to that of my other classmates, and so I imagined that I had the normal sized, member for my age.