It would be helpful to read the first chapter of this story, so that this story will make more sense. As always, this is all made up.
A few weeks went by since that fateful night when Jack and Andrea crossed over the taboo line with each other. They managed to sneak some time together, and they helped themselves to each other, learning more and more about each other sexually.
Today was Jack's day off, and as part of the "rent" that he paid his parents, he was cutting the grass. Jack was wearing denim shorts steel toed boots, and safety goggles. He was shirtless, but he was wearing a baseball hat. As it was, it was hot and muggy outside, and his athletic chest glistened with sweat. His other sister Donna was visiting her boyfriend Brad across town, and their parents were on a cruise, celebrating their anniversary.
Finishing the back yard, Jack moved to the front. As he was finishing the lawn, Andrea pulled up in her Honda. Jack could see that she had her boyfriend, Steve with her. Jack liked Steve; they had been in some classes together in high school, and while they weren't close friends, Jack new Steve was an okay guy.
As Andrea got out of the car and waved at her brother. Steve came around from the other side of the car, and put his arm around his girlfriend. Just under six feet tall, Steve didn't really have an athlete's body, more lean and wiry. He had sandy blonde hair that came down to his shoulders, which was kept in its usual ponytail. He was in shorts, and had a t-shirt on of some obscure band.
Jack stopped the mower, and greeted his sister and her boyfriend. "What have you guys been up to?"
Steve said, "Not much. I have a new CD that I want Andrea to hear." Steve stared at Jack in a way that was slightly unnerving. "Maybe when you're done, you could give it a listen."
"Sure, why not," Jack replied. "I'm always on the lookout for something new." Andrea kissed her brother on the cheek and said, "See you inside then."
Ten minutes later, Jack finished the lawn. He put the mower back in the garage, and went inside. On the table, he found a glass of lemonade, and a note that read, "Thought you'd like this. Come see us when you're out of the shower. Andrea."
Jack downed the drink in no time, and headed to his bedroom. He passed his sister's room on the way. Andrea and Steve were sitting on the bed, listening to the music, not even noticing he was there. Jack got to his room, stripped, and headed for the bathroom after wrapping a towel around his waist.
While soaping up, Jack wondered if Andrea and Steve had had sex yet. They'd been going out for two weeks, and Andrea seemed really happy. He pictured Andrea giving Steve head. The thought of his sister with Steve aroused him, and his cock hardened. He soaped up his cock and began to stroke it. He picked up momentum as the scene shifted to Steve taking Andrea from behind. He wondered what Steve's ass looked like. He then wondered why he was wondering that.
Jack stopped masturbating and finished his shower. He dried himself off, and went to his sister's room to tell Andrea and Steve that he would come back after he got dressed. As he got to Andrea's door, he noticed that it was almost closed. He looked in, and it was as if they new what he was thinking. Andrea was sitting on the bed, giving Steve a blowjob.
Jack took in the scene. Steve was naked from the waist down, his hair freely flying about his head, having been released from the ponytail. Andrea looked at the door, and motioned her brother to join them.
Jack entered the room and crossed the room to his sister's bed. Andrea stopped her oral pleasuring of Steve, and she said, "Want some company?"
Steve looked a bit shocked when he saw Jack, but answered, "I don't mind sharing, if you don't?" Instead of looking at Jack, he said this to Andrea.
"Not at all," Andrea said, and picked up where she left off.
Jack got on the bed. He then positioned himself so he could play with his sister's pussy. He could see that Steve did a good job of getting her going; she was very wet. Jack bypassed fingering her, and started to lick her slit, and wrap his tongue around her hardened clit. He knew that his sister liked it, and she moaned her approval, which vibrated around Steve's cock. Steve gasped as he enjoyed both the feeling and sensation of Andrea's mouth on his manhood. But he also liked the looks of Jack's eight-inch turgid cock. He stripped off his shirt, reached down, and lightly ran his fingers up and around his girlfriend's brother's pole.
Jack felt the hand on his cock, but kept on eating his sister's pussy. It was when the hand wrapped itself around his member, that he realized it was Steve's. It felt good.
Andrea saw Steve's hand on her brother's cock, and it turned her on more. She slid her mouth off Steve's dick, and sat on her brother's face. Steve took the hint, and his mouth zeroed in on it's objective.
Jack knew the tongue on his balls were Steve's. If it hadn't felt so good, he would have stopped him. But Steve seemed to know what he was doing. Soon, Andrea turned around, so that she could get a better look.
Steve licked up and down Jack's cock, enjoying the feeling of it on his tongue. He'd only ever been with one guy, but he knew he liked guys as well as girls. He shifted so that he could rub Jack's balls with his hand. He liked the feeling of having another man's balls in his hands. Jack seemed to like it, too.
Andrea joined her man, and they both took turns licking and sucking Jack's cock. All the attention caused Jack to tense up and shot rope after rope of semen from the purple head of his cock. Both Steve and Andrea were hit in the face with some of Jack's seed, while the rest landed on Jack's chest and belly. Steve and Andrea lapped up the excess, and then licked each other's face, so as not to waste a drop of Jack's warm product.
Andrea couldn't believe how turned on she was. She grabbed her boyfriend, and threw him on his back next to Jack. She then quickly impaled herself to the hilt on Steve's seven-inch cock. It was a little thicker than Jack's and she bounced herself up and down on his pole.
Jack looked at the ecstatic look on Steve's face. He leaned over, and kissed his sister's boyfriend. Steve eagerly accepted Jack's tongue, and they kissed while Andrea's sliding up and down Steve's cock. Jack rubbed his hands up and down Steve's hairless body. Steve could take no more, and lifting his ass off the bed, he fired his load into the now-orgasming Andrea's cunt. It seemed to go on for an eternity, but soon Andrea slipped off her boyfriend, and lay down beside him on the opposite side from her brother.
