This Story is absolutely true. The names have been changed for discretionary reasons. This is the first part of several stories to come building up to me fucking my hot older Sister-in-law, Mary.
At the time this part occurred I was 42yrs old, my sexy wife was 41yrs old and her gorgeous older sister who was 15 years older than Molly was 56yrs old. I had always found Mary to be hot a hell from the first day I meet her when I started dating Molly some nine years ago. Even on our wedding day Mary distracted me wearing this skin tight sexy dress and slutty heels. Molly and I were and are still very happily married when these events with Mary occurred. We had been married a little over 8 yrs.
But first a little about my wife. Molly is sexy as hell and very fit. She is 5'6" 120lbs olive skin, dark brunette hair, hazel eyes, 34a small, but perky breasts, athletic legs and a fit round high ass to die for. She is very sexual and our sex life is great. Her older sister has the same build. Mary is also 5'6" probably 115lbs with lighter sandy brown hair and hazel eyes. Mary recently had a boob job to a healthy 34C, fit build, amazing legs, tone body and similar ass but just a little less thicker than Molly's. She carried herself very differently than my wife. She was very confident with herself and her body. She had a very rare sexual energy that she could put off. She loved to show off what she had, with sexy outfits and was very flirtatious.
Both have sexy feet and toes and for me, who has a huge foot fetish, I found this hot as hell. Both sisters are always in the gym together, working out, taking classes and running races to stay fit. Needless say I wanted to fuck Mary the first time I met her. She was the older version of what Molly would look like 15 years later but she was also different in personality which was also a huge attraction. She was always touchy and flirtatous with me. The two would always get compliments about just how similar they were. Again this appealed to something very carnal and deep inside of me and very quickly I developed a sexual lust for my Sister-in-Law that only got worse as the years went on.
It started innocently enough whenever I would see Mary. Whether hanging out with Mary and her husband, with Molly or when she would babysit our kids, drop them off etc. I would then fuck Molly that night imagining it was Mary. All day, I would edge thinking of fantasies involving Mary. What she was wearing, her hitting on me or me advancing on her and claiming her sexually. I would do this until Molly got home and I could fuck her to fulfill the uncontrollable desire.
This continued and became routine. I started getting braver and would sneak pics of Mary with my cell phone when she was not paying attention. When I was alone I would study the pics and jerk off to them and fantasizing about the moment we were in and roleplaying sexual fantasies. I would get lucky sometimes and get a pic of her in a bikini at the pool and would have so much fun looking at her pics and jerking off to her.
Eventually, I would print pics of her face and masturbate giving her facials. Anything I could do to make the fantasy of fucking Mary more realistic I did. I was obsessed with Mary and could not stop my behavior. I got braver and braver as time went on and the desire grew.
When we would pet sit for Mary and her husband while they were on vacation I would go over and sniff her panties and lick and sniff her sexy heels. One time, I even jerked off in a sexy pair of heels and left my cum on the inside soles of the heels. I was so unbelievably aroused at the idea she would eventually wear them and my cum would be on her sexy soles. This behavior was added to the sneaking of pics and fantasizing about her. The obsession was only growing and I could not be satisfied.