For a long moment, Patricia just looked at Jennifer, waiting for her to start laughing or at least smirk from not being able to keep a straight face. Neither of those things happened.
"What?" she finally said.
"I've been fucking Shawn." Jennifer repeated.
"Holy shit, you're serious." Patricia said.
Jennifer nodded.
"How long has this been going on?"
"Three months now." Jennifer said.
"Three months?!" Patricia exclaimed. "And you're just telling me about this now?"
"Well it wasn't something I could just blurt out in a text message or in a phone call. This was something I had to tell you in person." Jennifer said.
"Wait, wait, wait." Chaz said, looking at Shawn wide eyed. "You've been fucking your mom for the last three months? You're messing with me, right?"
"Nope," Shawn said, "I swear to god, mom and I have been going at it at least 3 times a week."
"Holy shit man," Chaz said, "I'm speechless. I guess I always realized our moms were pretty hot, but I don't think I've ever thought of my mom like that."
"Hell, neither did I, until I came home one day and caught a glimpse of mom through the bedroom door." Shawn said. He then proceeded to tell Chaz everything. Accidentally catching sight of Jennifer after her shower, spying on her, her catching him masturbating, the masturbation session with Deborah, writing down his sexual fantasies about his mother, having her read them, reading her fantasies about him, having sex with her and Deborah, and the almost daily sessions with his mother since then.
"So how is it?"
"Oh my god, sis. It's fucking amazing." Jennifer said, "The kid's hung like his father."
"You gotta tell me how this all started." Patricia said.
So Jennifer told Patricia everything Shawn had told Chaz, only from her perspective.
"Wait, wait, wait," Patricia said, "You've been having sex with your therapist too? Actually, does your therapist know about me? About us?"
"God no," Jennifer said, "I mean she knows about you, but she doesn't know about us. Hell, I haven't even told Shawn. Plus you haven't seen my therapist. She's fucking gorgeous and has the most amazing tits I've ever seen."
"How big are we talking?"
"Like out to here." Shawn said, over exaggerating the size of Deborah's tits with his hands. "Okay, maybe not that big. But big."
"More than a handful?" Chaz asked.
"Oh yeah," Shawn said, "Definitely more than a handful. Double D's if I had to guess."
"Damn Shawn," Chaz said, "How come you never told me about this before?"
"Well it's not exactly casual conversation," Shawn said, "It's not like I can just casually text you 'Oh, by the way, I'm fucking my mom', you know."
"I should be mad," Patricia said, "But considering we've been having sex for years behind everyone's back, it'd be extremely hypocritical."
"No need to be mad," Jennifer said, "After all, you're my sister, and we've always shared everything..."
"Wait... are you saying...?" Patricia asked, then saw the look in her twin sister's eyes. "You are. Oh my god, sis, I love you."
Jennifer leaned forward and kissed her sister, "So here's what I have in mind..."
Later that night after a dinner where Patricia and Chaz were trying not to look at Jennifer and Shawn any differently than they had before, eventually everyone headed off to bed. Jennifer and Patricia in Jennifer's room, Shawn in his room, and Chaz next door to Shawn in what was originally the guest bedroom but was unofficially Chaz's room.
About an hour after everyone had gone to bed Jennifer and Patricia put Jennifer's plan into motion.
Shawn heard the door to his room open, "What kept you?" he asked, turning on the light revealing Patricia, who was naked as the day she was born.
"Wait, you knew about this?" Patricia said.
Shawn smiled. "Of course Aunt Patty. Did you really think mom would plan this without telling me about it?"
Patricia sat down on the edge of Shawn's bed, "So I'm guessing you told Chaz."
Shawn nodded, "Yep, told him all the gory details, just like I'm sure mom told you everything."
"I should have known." Patricia said, shaking her head and smirking.
"You really are the mirror image of mom." Shawn said, looking at his aunt's body, reaching out to gently squeeze one of his aunt's tits.
The two leaned in to share a kiss, as Patricia threw back Shawn's blanket to reveal he was naked underneath.
"All ready for me I see." Patricia said as they broke the kiss, she looked at his erect cock.
"I've been waiting all day for this. Hell, I've been waiting all week for this ever since mom suggested it." Shawn said.
"Good lord, your mother wasn't kidding, that is impressive."