Vicky and Torri (3)

Mark almost fell over. He had emerged from his bedroom and ran into his sister on her way back from the bathroom. She had been wrapped only in a towel, and, while she had pulled the towel up enough to conceal her little boobies, it was so high that her twat was stickng out the bottom. The look on her face was completely devoid of any guile, so Mark assumed that Torri was unaware that she was hanging out.
His cock became instantly hard, and he rushed into the bathroom to punish it once again for its impertinence.
As though I don't have enough trouble with my dick, he thought; now I have my sexy little sister flashing her cunt at me. Mark stroked it again, for the third time that day, and relieved himself into a wad of tissues. It was becoming very difficult to accomplish much lately. It seemed to him that all he did was dwell on his ever stiffening cock.

"Mommy," Torri said later that day, "you should have seen Mark's eyes bulge out when he spotted my pussy this morning. I thought that they would pop out of his head, and I could see that he developed an erection almost right away."
"Good work, baby," Vicky replied. "It's just as I expected. Even though he is only fifteen, his emerging sexuality has become difficult to control. Every day he is like a sailor on a twelve hour liberty, as you Uncle Bill used to say. Mark needs to be reined in with our help."
"I don't understand why doing yourself is not enough, mommy," Torri said. "I notice that each time you helped me, the pressure abated for a few days and only gradually comes back."
"It is just as I told you, honeybunch. There is something unusual in our family that makes us super sexy most of our lives, and even marriage with outsiders does not seem to dilute this trait. Some of our ancestors attempted to join the Oneida Community because of their more liberal attitude toward sex, but it was not enough. Fortunately, my great grandfather met a Professor Nusselheim at the Oneida Sect. This professor wrote a book about family sex."
"Family sex, mommy, like us?" Torri asked.
"Yes, Torri, but Nusselheim's proposal was made primarily to protect children from the terrible incurable diseases that could be caused by careless sexual activity. He was not aware of people like us, a family that possessed such strong sexual urges that the members were out of control some of the time."
"Is Mark out of control, mommy?"
"No, baby, not yet, and with our help, he won't be."
"Do you still want me to help Mark?"
"Yes, baby, remember what I told you, and I will be nearby in case you run into trouble."

That evening Torri knocked on Mark's door and gained entry to his room on the pretext of wanting to borrow a book. Earlier she had slipped into her brother's room and had hidden this book so that it would take some time to locate.
It was difficult for Mark to take his eyes off his 18 year old sister. Torri was dressed in a very thin nighty that barely reached halfway down her thighs. He could see her little nipples by their pressure on the filmy fabric.
"Damn!" he cursed. "It was just here; I remember seeing it two days ago and didn't touch it." He ran his hand over the books in the bookcase one more time.
"Maybe it's under your bed," Torri suggested. She bent over to look, and, when Mark turned toward her, his sister's bare buttocks were right there in front of him.
"Oh god," he moaned softly. His sister was so cute. He seemed to be seeing more of her lately, like that morning, when he got a good look at the sweet, bare cleft between her thighs. Not only that, but his mother was also wearing more revealing attire lately.
Torri looked up and saw the bulge pushing out Mark's shorts. "What's that, Mark?" she asked, feigning innocence.
"Uh... what's what, Torri?" he replied turning away to conceal his stiff cock from her view.
"That big lump, silly, in front of your shorts," Torri informed him.
"Nothing, it's nothing,"
"No, it was something. I saw it." Torri moved around him and pointed at her brother's shorts. "There it is. What is that?"
"It's my COCK, Torri, and the damned thing is controlling my life" the young boy cried out angrily. "I have enough difficulty with it without you showing me you cute ass."
"Is my ass really cute, Mark?" Torri asked smiling and closing in on her brother. "Do you think that I am cute?"
"Yes, you're so cute that I can barely stand it. See what you are doing to me," he moaned. "It's aching so!"
"Let me help you, Mark. I love you; you know that."
"What can you do to help me? You are only thirteen."

"Let me show you," she replied. She dropped down to her knees and yanked her brother's shorts down to his ankles, pulling his briefs partially away from his hips too. She pulled the briefs out of her way and grabbed her brother's cock with both hands.
"Mark, it's to big!" she exclaimed. It wasn't the five inch length that impressed her, but its four and a half inch circumference. She knew that he was not so large as her dad, but he was well hung.
"Oh, Torri, don't let go of me; you feel so good," Mark cried.
"I have to, bro, but just for a few seconds." She released the fine penis and quickly pulled her nighty off and tossed it aside. She spit on her nands and grabbed her brother's cock again. She leaned forward and kissed its dark head. Then she began her slow, but steady stroking.
"Oooooooohhhhhh!" Mark moaned.
"Yeah, sweet brother, shoot it out on me," Torri urged. Her relentless pumping continued on her brother's stiff, erect penis.
"Ohhhh god, yes, yes," the teenage boy cried out.
Torri moved one hand to her brother's swinging balls and cradled them in her damp palm. "Come on, Mary sweetie," she urged. "Come for me."
"AHHHGGGHHH... GOD... OOOHHH... NOOOOO!" he cried out as he spurted huge dollops of his hot cum onto his sister's bare chest. No matter how many times he masturbated, he would never experience this strong a sensation as this incestuous contact. He staggered away and collapsed on his bed.
Torri wiped herself off with some tissues and donned her night gown. She left her brother with a kiss and slipped away down the hall to her waiting mother.
"I heard him," she said, smiling at her beloved daugher. "It seems that you were very successful. That should cool him down a little."