All characters in this story are 18 years old or older. This story was inspired by "Use your sisters instead" by Spector_Dugan. If you have not read his story, please check it out!
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"Aaron! Again? You have to stop!" Susan had walked in on her son masturbating again. She was bringing his laundry to his room and saw him pumping away underneath his covers.
"I've told you; the Bible teaches us that it is a sin to masturbate." Susan dropped the laundry basket next to his bed, putting her hands on her hips.
"I.. I.. I'm sorry..." Aaron stammered as he tried to hide his erect penis. It didn't work very well. Even under his sheets Susan could easily her son's large appendage. He had inherited that from his father who had passed away several years ago from a heart attack. Susan believed God had called her husband to him. A doctor would have told her he suffered a heart attack during intercourse.
"I don't know what to do with you." She said sitting down on his bed burying her head in her hands.
Aaron had been right on the verge of an orgasm. He still had his dick in one hand, and he could see the outline of his mother's large round breasts. Even after four children her breasts remained as full and firm as any woman could hope for. Of course, they sagged more than they used to, but she was by all accounts a mother you would like to fuck.
Aaron's mother wore the traditional dress of his community. A thin cotton dress with floral patterns that hugged her hourglass body snuggly and was almost see through in the right light. They lived in a small religious farming community in California. People outside of their community might call it a cult but to the Stringer family it was just how things were.
Aaron felt his hand slide toward the tip of his dick involuntarily. He rubbed the pre cum that had beaded up on the tip around his head shuttering slightly. He couldn't stop starring at his mother's large breasts and her thin waste which grew in her round plump bottom.
"Aaron, I'm going to talk to father Mattias about this. I'm sorry but I don't know who else to turn to." Susan still had her head buried in her hands and couldn't see that her son was staring at her.
Aaron was so close. He was right on the verge when his mother had opened the door. Aaron had used his sisters as masturbation fuel for as long as he could remember but seeing has mother while in his aroused state painted her in a whole new light. He began to rub faster, trying not to make any sound.
"Will you please stop until I can speak with father Mattias?" Susan said while turning to look at her son. She had bright blue eyes and full red lips in a pleading expression which only served to turn her son on more. Her oval head was framed with silky brunette hair that wasn't quite long enough to cover her ample cleavage as she turned to face him.
Aaron couldn't help himself. He started rubbing his head faster, making a squelching sound that his mother could now hear.
"Are you still masturbating!?" she yelled ripping the covers off him. It was at that moment he came. A thick rope of cum rocketed out of his penis as the covers flew off and before he could cover himself. The semen landed right in Susan's cleavage. She jumped back surprised. Aaron put his hand over his spurting head, rolling over on his side. Susan felt the warm sticky cum in between her breasts and reactively reached up to feel it. She brought her hand up and confirmed that it was what she was afraid it was.
"Aaron!" She yelled at him storming out of his room while he finished convulsing on his bed.
That was the last straw for Susan. She had tried everything she could think of to get her son to stop masturbating. She didn't know that Aaron's libido was extremely high. Both Susan and her late husband had high libido and their genes had combined to make children with insatiable sex drives. Aaron had the worst of it.
Susan went to father Mattias that same day. She explained the situation to him and told him that her son just wouldn't stop, and she didn't know what to do. Father Mattias told her it was only a sin if a man orgasms outside of a woman. A man must simply empty his seed in a body of a woman to remain sinless in god's eyes. He told her of a story from the bible where two daughters got their father drunk and lay with him. He suggested that Aaron use his family in whatever way he needs to remain sinless. He told her that none of her three daughters were married yet and still live at home. Aaron is now the man of the home since his father's passing and the women were created to serve the man of their home. Therefore, it is right and good that the women serve whatever need the man has. Father Mattias told her that sometimes he uses his daughters to satisfy his needs and that Aaron has the same right now.
Susan was a beautiful and kind woman, but she could also be very trusting and naive. She married her late husband when they were young. They not long after left the world they knew following a man who called himself a prophet into the mountains. They both left large families behind. They still communicated through letters, but visitation was heavily frowned upon.
"As god wills it." Susan said as she left the chapel. She was conflicted. It seemed wrong coordinate this incestuous act but many things she was told about her religion conflicted with her natural instinct but, she had overcome those instincts before, and this would be no different.
Susan called all her children to the table that evening for dinner and to discuss what was going to happen. She hadn't spoken with Aaron since their incident that morning. He came down the stair looking sheepish and avoiding eye contact with her. Her daughters seemed none the wiser. Going about the evening as usual, setting the table and setting the food out.
Holly was the oldest. She was the image of her mother. Large, bright blue eyes and full lips with expressive eyebrows and perfectly smooth white skin. Her hair was a light blonde in contrast to her mother's brunette. Her mother was full and shapely where Holly was thin and petite. Holly was barely 5' tall but still had large breasts "for her size" that were firm and extended outside her torso so that you could see them from behind. She was thin but her hips sloped out to a full round butt that would spring with every step. Her legs where shaped like an athlete from the hard work she wasn't afraid to do. She would go up and down trails in the mountains looking for berries and mushrooms and anything else she could find to eat. Holly loved to cook and to eat what she cooked.
Aaron was next in age. He was tall like his father. Dark hair and thick muscles from the hard work of living on a farm. He had a boyish face and dark hazel eyes. He often just wore pants while he worked so he was well tanned. He also had inherited a large penis. A large overactive penis. The more blood that goes to a penis the less a man's brain has to think. Aaron's brain did not have much blood to think with. Aaron had a kind heart and was protective of his family. He had been in more than one fight over other boys teasing his sisters. Aaron was known as a hot head in their small community and his willingness to fight boys that doted on his sister more than likely contributed to all of them still being single.
Alice was the third child born in as many years. She was also tall like her father and if Aaron's overactive testosterone hadn't given him such an advantage she could have been as strong and tall as him. She was lean and well-muscled, doing most of the same work Aaron did. She had still inherited her mother's full breasts and round butt. Her red hair and bright green eyes made her stand out from the red of her family. She was one of the few women who wore pants to work during the day and a thin form fitting top her mother made for her so Alice would be cool while she worked.
Tammy was the last of Susan's children. She was even shorter than her mother and Holly. She had a kind, innocent face with big eyelashes and dimples when she smiled that could melt the coldest of hearts. She had dark brown eyes and black hair. She wasn't as petite as Holly and wasn't as thick as her mother but was a good balance between the two. Her hips were as wide as her mothers with a full butt that was always straining against any dress, she stuffed it in. Her breasts were small, almost flat with small nipples. Tammy was thoughtful and a bit of a peace maker in the community. She was friends with everyone. She had many chances to be romantically involved with someone if it had not been for her brother. She didn't mind it though. She always felt safe around him and felt a connection with him and her family that she didn't think she would find anywhere else.
Susan finished looking over her children. She was nervous about how their family dynamic was about to change felt believed it was for the best. The family finished eating dinner and she got their attention.
"Ahem..." All her children looked at her. "All of you are aware of Aaron's struggle with masturbation at this point.
"Mooooom" Aaron groaned. All his sisters had walked in on or found him masturbating at one point. His mother already had several conversations with them about it.
"You all know that masturbation is a sin. But I spoke with father Mattias earlier today and he gave me a solution to Aaron's struggles. He explained that sometimes a man's desires are simply too difficult for him to overcome alone. We all have struggles that we need our brothers and sisters in the faith to overcome and this is simply another struggle that Aaron is going to need his actual sisters to overcome."
"Really!" Holly said excitedly putting her hand on Aaron's arm. "We all wanted to help but don't know how."
"You wanted to help." Alice said sarcastically.
