Everyone in this story is over the age of 18.
Marsha found Justin in the recreation room, getting the lights dimmed and soft relaxation music on. There was a sweet scent in the air, but not from sex, she thought.
Justin had rushed to burn some incense in the room to cover the lingering smell of the great sex he shared with his sister. Now the room should pass inspection.
"Okay mom, just like yesterday, and I'll be back in a minute."
Justin stepped out and went to see Sarah while their mother got on the table.
"Sarah, I'm going to give mom a massage now. Do we need to talk later, or are we good?"
"We're good, Justin, don't overthink this. It is two consenting adults that love each other. We may never get married and have a family, but I love you and want sex. How about you?"
"Same." Said Justin. "I'll see you in a while."
Justin returned to his makeshift massage room and asked, "Mom, are you ready?"
"Yes, sweetheart, I'm ready."
Justin began his massage as always, starting with the back and neck. Marsha felt Justin's strong hands firmly but gently massaging her tight muscles in her back. She was certain that this sexual adventure she was trying to live was causing her stress and getting her all tight. As Justin worked on her, she began to relax. Her breathing slowed, and her body started to melt, and a slight moan escaped her lips. "Huummnh" She didn't apologize for it.
Justin continued to work through her moan without comment. He knew that it was totally normal for people to release stress and tension in this way. It was how he knew he was doing well. Some actually cried after releasing tension held in the body.
Justin was now working on her lower back and into her buttocks or Gluteus muscles. AKA her ass. Justin couldn't help associate massaging his mom with massaging his sister, here in the room, so close to the same time he did his sister. He was looking at his mom with the same eyes as he did his sister now. He had his hands on her ass and was enjoying it. "I'm never going to be able to do this professionally," he thought to himself. His boner was not full yet, and making it stop was nearly impossible.
Marsha was having similar thoughts as Justin started working on her lower back and ass. She was totally focused on his touch and feeling totally hedonistic. Her body was starting to feel electric, all tingles, and excitement. Some anxiety and trepidation as well, but she was pushing those feelings aside. Finding her children already committing incest, is what gave her the courage to follow suit. "Oh, Justin, this feels so good. I can feel my body letting go. I must hold a lot of tension there in my butt, don't stop".
Justin, having been encouraged to massage his moms' ass, was feeling less guilty for spending more time on it. He was enjoying the feel of his mother's bum, which was quite nice, considering her age. He spent a bit longer doing some deep tissue massage on her glutes and hips.
Moving down to Marsha's legs, Justin uncovered her one leg to the hip, tucking the sheet so to keep her private parts covered, as he had done with Sarah. He poured some oil into his palm and started applying it to her entire leg from ankle to hip. Marsha again moaned in pleasure. Justin thought that the moan sounded a little more sexual than it had the first time. Was it his lustful imagination, or was his mom getting aroused as well?
Justin continued massaging her legs as professionally as possible, but he was losing the battle. His boner was definitely growing out of control. Actually, his boner was taking control. As he worked higher on Marsha's leg, nearing her crotch, he thought he could smell the now familiar scent of a woman. An aroused woman.
Marsha was getting wet now, her arousal was making her breath quicker, and she was feeling light-headed as she spoke, "Justin, can you see my pussy?" She repeated the words she overheard from Sarah.
Justin froze, again. His hands mid-thigh on his mother, not moving. Marsha sensed he was in a state of shock and said, "It's okay, Justin. I know what happened with Sarah earlier. I don't know how far you two went, but I don't care, really, but I would like to know if you could give me the same treatment...please?"
"How, how did you know? Did Sarah say something to you?"
"No, I came home a little early and when I came to the door here, I overheard and peaked around the corner. I watched for a bit, wondering what I should do. I slipped back out and went to think about it for a while. I was aroused at the sight of you two and was confused. I've since come to want this too, if it's something you would consider?"