Author's Note: All characters engaging in sexual relationships or activities are 18 years old or older.
The Stevens family consists of three members: father Steven, mother Marry and son Mark.
Steven 50 years old, largely built, with thick black-gray hair and dark eyes. He is open-minded man, faithful to his wife Marry, a typical example of a family man who spends all his free time in the company of his family. He and Marry have been married for 20 years and after two years of marriage, their son Mark was born. Steven is a faithful man, it never occurred to him to cheat on his Marry, even though he had more than one opportunity to do so.
Marry is younger than Steven, she is 43 years old. She is a short woman, and could not be called a beauty. She is a fat lady, the extra weight is mostly distributed in her legs, hips and extremely large buttocks that are sticking from her back. Her hips are wide and her legs are very thick. Her breasts are not particularly large, they are of medium size and slightly drooping. They end in large alveoles and large, always hard nipples. Marry is a hardworking, dedicated woman faithful to her husband and full of love for her 18-year-old son Mark.
Mark is a big, strong and healthy 18-year-old and the only son of Steven and Marry. His parents raised him extremely well, and he was an obedient and decent young man. Since Mark's birth was difficult, Marry barely survived it, the couple somehow couldn't decide to have another child.
The Stevens's are a happy family living in a spacious apartment on the outskirts of the city, they are in good health and economically well-off. Steven is a lawyer employed in the local civil service, while Marry is employed as a secretary in a large local company.
Steven and Marry's sex life can be characterized as typical for their 20 years of marriage. They make love 1 to 2 times a week, mostly in one of the typical positions - most often missionary, and sometimes Marry would be on top. Since Steven's penis is not particularly large - about 6 inches, they would rarely do it in a doggy position. Because of Marry's big ass, Steven couldn't go deep enough into Marry's vagina. They never tried oral or anal sex, although in their conversations lying naked in bed they never avoided any topics related to sex. Simply, they have both always loved classic sex.
Mark, at 18, was still a virgin. He had no experience with the girls, and in all those years a terrible hormonal flame burned in him. Mark's 7 inches long penis was hard practically all day (and most of the night). Since he didn't have many friends, he spent most of the time in the house and the only female person in front of his eyes was his mother Marry. Because of this, he developed a rather serious case of Oedipus syndrome and lust for big women with big butts.
Since they lived in a relatively small apartment, Mark had the opportunity to see Marry completely or partially naked on many occasions. In the house, Marry always took care to be decently dressed in front of her son. She wore T-shirts and knee-length skirts, and during the hot summer months she would wear short shorts which would make her thick legs visible and her big buttocks very pronounced. Clearly, Mark's favorite time of year was summer.
Several times he accidentally entered the room while Marry was changing and had the opportunity to see her bare breasts, and sometimes her naked huge ass and hairy pussy.
Marry noticed almost constant bumps in Mark's underpants and suspicious stains on his underpants when she put them in the washing machine, but she attributed that to the hormones of the 18-year-old teenager. Lately, however, she had been noticing his gazes directed more and more at her bare legs, chest, and crotch. At the beginning, she didn't pay much attention to that, but she started to think about everything more seriously when she found her big panties wet and sticky on two occasions while washing her clothes. It was obvious that the part of the panties that clung to her pussy was wet with male semen. It became clear to Marry that Mark was taking her used panties and jerking off into them. Although she had heard that young boys do such things at his age, she was still shocked and surprised.
Mark was a well-mannered young man who would never take a direct step when it came to lust for his mother, Marry knew that. For this reason she knew that her only son was suffering greatly, because Mark knew that his mother would never consent to any sexual activity with him out of respect and fidelity to his father. On the other hand, Mark truly loved his mother. He didn't just want to sleep with her, he wanted to make love to her, hug and kiss her.
Marry became increasingly awkward about Mark's lustful looks, and kept thinking about Mark. She decided to talk about this problem with Steven. One Saturday night, after the usual Saturday missionary sex with Steven, while lying naked in embrace, Marry began a conversation.
"Steven, our Mark is a big boy." she said at the beginning.
"Yes, he just grew up and developed into a real young man." Steven replied.
"Steven, I think he has fantasies about me. He keeps hanging around me and staring at me. A couple of times he burst into the room while I was changing, I think he did it on purpose and not accidentally as he said. A couple of times I found cum in my used panties." she said worriedly. Steven was silent for a moment.
"Are you sure?" he asked.
"Yes." she replied. "I'm worried, Steven. Mark is a quiet guy. I'm afraid for his mental health. Why would he be attracted his old and fat mother?"
"Yes, that's worrying." said Steven, "I should talk to him."
The next day, Steven invited Mark for a face-to-face conversation. He asked him a couple of questions about the girls from the school and the neighborhood, to which Mark just shyly lowered his head and replied that there was not a single girl that would interest him.
"What kind of girls do you love, son?" Steven asked. Mark lowered his head, all red with shame.
After a few seconds of silence, he replied quietly, "Dad ... I ... somehow I like older women."
Steven added with a smile on his face: "... and a little bigger ... like your mother?"
Mark jerked abruptly, frightened. "... I ..."
"Don't be afraid, Mark, I guess that's normal. Your mother is always in front of your eyes. You should hang out with girls your age, Mark." added Steven.
Mark just shrugged. "But Dad, I'm not interested in girls my age at all."
Steven placed his hand on his son's shoulder. "You should try, son. Believe me, young girls are much better than your big-ass mom" Steven winked, letting it be known that this 'big-ass' was meant as a joke.
After this conversation, Steven and Marry hoped that Mark would turn to younger girls. However, nothing in Mark's behavior changed. He became a little more careful, making sure Marry didn't notice his looks. But he could not hide his lust entierly.
After a few months, a hot summer came and Marry and Steven talked about Mark in bed again.
"Steven, the situation with Mark hasn't changed much. I think I noticed him peeking through the keyhole yesterday while I was undressing. I don't know what to do." she said.
