"Huh?" Billy cried. "Mark's my father?"
"Will someone tell me what's going on!" Jane demanded, looking incredibly worried and angry. Her large tits swung heavily on her chest and her clit dripped icing.
"Billy's my half-brother if you're his father, right. Mom?" Sue squealed happily, quite undisturbed by the revelation.
"Let's all sit down in the living room," Mark said. "It's time for some confessions, I guess."
"I think so," Jane said, not liking the way Billy's mother was hanging onto her husband. She took Mark's other arm.
"C'mon," Sue said, unbuckling and unzipping Billy's jeans. "Get naked like Mom and me."
No one seemed to notice Billy's half-hard cock when he sat on the sofa next to Sue. The girl played with it while her father explained things.
"I guess the best way is to come right out with it," Mark said. "Linda's my sister. I fucked her when she was a teenager. I got her pregnant and our parents split us up and sent us away. I haven't seen her since that day. And Billy is our son. My son."
"God!" Jane said. "That makes him, uh, your half-brother? Or your brother-son?"
"I've given up trying to find a name for our relationship," Linda said softly, wiping her eyes. "He's my son, and that's enough. But we do have a tangled relationship here. I mean with him and Sue. My God, I can't get over the coincidence of your moving here! Of all the places in the world, my brother's wife and daughter move onto my street!"
"Life is a hell of a lot stranger than fiction, Sis," Mark said, putting his arm around her shoulder and hugging her.
"I hate to put a damper on this reunion," Jane said, "but to put it bluntly, are you thinking of starting where you left off? Fucking her, I mean?"
Linda's eyes opened wide. She hadn't even thought about having sex with anyone other than Billy, but now she recalled how wonderful Mark's fucking had been.
Mark looked at his sister, then at his wife. "Jeez, Jane, I hadn't even thought about it. I won't if you don't want me to. Hell, I'm not even sure Linda wants me!"
Sue didn't like the way things were heading. "Mom," she said, "you liked Billy's fucking, and he says he wants you again. If he can fuck you, why can't Mom fuck his own sister?"
Mark looked at Linda and felt his balls begin to boil. Her face was strangely the same, but her body had really filled out. What a pair of jugs! "What about it, Sis? If Jane says it's ok, shall we have a real reunion?" Linda looked at the growing bulge in his pants and shyly nodded.
"Jane?" Mark asked, looking at his wife.
Billy was standing in front of her where she sat, and his cock was at half-mast and growing. He saw her lick her lips.
"Oh, shit!" he heard her whisper. Then, louder. "All right, Mark, I guess I shouldn't be jealous of my own sister-in-law. But I want to watch. Let's all do it in the same room."
"How about here?" And he opened the suitcase he'd brought in and took out a U-shaped dildo.
"Wow!" Sue giggled. One end was shaped like an extra-big cock. The other was like a thin, bumpy pipe. A harness arrangement was attached to it.
"This'll help you two to get better acquainted," Mark said. "Jane, you strap it on. Here, I'll help. Then Linda gets on her back, raises her knees to her chest, and you slip the big one into her cunt and the little one into her asshole. Then you fuck like crazy."
"And what am I supposed to get out of it?" Jane asked.
"See all these lumps and ridges on the inside? They're made to stimulate a normal sized clit and bring a woman off. What do you think they'll do to yours?"
Jane stared at the double-dildo arrangement. She looked at Linda. "Do you want to?" she asked.
"I-I'd like to, later. But right now, I just want to be with Mark. I have so much to tell him, and I want to know what happened after he was sent away. And…" she grabbed his cock through his pants. "I want him to fuck me so much I can't stand it!"
"Mom's got Billy, Linda's got Mom, so what do I get?" Sue cried.
"Why don't you try that dildo up your ass?" Billy said as the fat head of his cock was swallowed by the girl's mother. "You climb on the couch, here, and stick your ass up and I'll shove it back and forth, ok?"
"Yeah, I guess." But it was obvious Sue was not enthusiastic about the idea.
"Wait, I've got a better idea. Put the harness on your mother. She can fuck you in the ass with it and I'll get behind her and fuck her ass, ok?"
"Yeah, let's do it!"
What followed filled Jane with an ecstasy she never would have believed possible. The bumps stimulating her big clit, the feel of her body beneath her, and the rhythmic intrusion of her sensitive bung by Billy's huge hard-on brought her first cum quickly. It was followed closely by a second. Soon, she was unable to tell where one climax ended and another began. She was aroused front and back, and her screams filled the room.