When we emerged, my wife and her mother were tending to the drinks we'd been neglecting. They were naked on the porch, and we joined them. Christy handed Anne her drink.
"How do you feel?" she asked with a bright smile.
"I might be a bit sore tomorrow" Anne replied with a blush.
"Nothing wrong with that. Honestly I get bitchy if I go a month without feeling that" Barbara said.
"Month? 48 hours maybe" Christy stage whispered. We all laughed.
"So how long can you stay?" Christy asked Anne.
"Don't know -- but I'm not leaving until I'm -- we're all -- satisfied."
"That... will work." Christy said with a smile. We all relaxed on the balcony for a while. Anne brought me some ice water. Barbara had Anne sit in her lap, and the two women lazily stroked each other while we all watched the seagulls and listened to the waves.
I woke up to the sound of my wife's voice from inside the cottage. "Anne, can you come here please?"
We all got up and went inside. Christy was standing in the middle of the room. She'd donned the strapon and pointed at it. Anne smiled, walked up and kissed my wife. Then she got on her knees. It was a very erotic sight; my wife standing over our lover the way I'd stood so many times. Anne got to work, but she was looking at me more than at the fake cock. She was putting on a show. Christy gave little thrusts with her hips. She played with her nipples. Barbara knelt behind Anne and began touching her. She fingered her and stroked her breasts, staring up at her daughter.
I was starting to recover. Barbara noticed and wiggled her hips. That convinced me that it was time to stop being a spectator and join in the fun. I got behind Barbara and slid myself into her pussy. She sighed with pleasure as my manhood stretched her. My mother-in-law rocked back to take me in. I held onto Anne with one hand, and Barbara's breast with the other. Anne continued working the strapon as my wife stroked her face.
I knew Barbara's body well enough by now to get her off quickly when I wanted to. I gave her several minutes of deep, hard thrusting, then adjusted my angle. Feeling your way inside a pussy is incredible. Yep, you heard it hear first. I found just the right spot, and began to really give it to her. Barbara panted, her torso swelling with her deep breaths. She was clinging to Anne now, and I was holding her in my arms as I gave her what she needed. She cried out, and I felt her pussy quiver around my embedded, hammering shaft.
When Barbara's gasps returned to normal, I kissed her neck. "You're amazing, you always are lover." That earned me another wiggle, and a deep "mmmm."
I pulled out of her and stood beside my wife. Anne was instantly distracted. I gave my wife a loving, sensual kiss on the side of her neck. Before I was done I felt a mouth on my wet rod. Anne had chosen the real thing. I whispered to my wife "she's sucking your mother's pussy off of my dick." Christy shivered with arousal. Her mother was still on her knees, watching our newlywed lover suck me. Christy winked at me and walked around. Before Barbara knew what was happening, Christy mounted her mother with the artificial phallus. Barbara groaned.
"Are you fucking mommy?" she asked. I could tell this was really turning her on. Not that it took much with the horny, mature woman.
"Yes mommy. I wasn't sure you got enough from my husband, so I'll fill in."
"Well, he already filled me there..." Barbara said pointedly. Anne was still sucking and licking, but I could tell she was also listening intently. The incestuous mother-daughter pair fascinated her. I think it had been on the edge of acceptable at first, but now all I sensed from Anne was arousal. She'd changed in the last 24 hours!
My wife found the lube bottle. I pointed at a spot on the floor, and Barbara crawled over. I wanted Anne and I to have a good view. Christy lubed the strapon and knelt behind her mother. Barbara reached back and spread her cheeks. "Are you going to buttfuck mommy little girl?"
Christy didn't answer. She probed, got the rubber tool lined up, and shoved. Barbara cried out as her daughter forced the fake cock up her ass. "Oh fuck yes!" I was fascinated by the smile on my wife's face; very horny, with a hint of 'take it, bitch!'
Anne was inspired by the dirty act we were witnessing. She sucked hard, holding me in her throat for a few seconds every now and then. I grabbed her head and began making love to her mouth, pumping myself in and out of her face. She was pinching her nipples, harder than I would have expected. She struggled, and I realized she wanted to say something.
"Mount my pussy!" She turned and got on her hands and knees, lining up for the best possible view of the erotic show my wife and her mother were providing. I got behind her and mounted Anne's pussy. I was distracted for a moment, staring down at the puckered little hole I'd enjoyed earlier. But the feel of Anne's bare pussy and the visual delight of Christy and Barbara pulled my attention away.
I began pounding her. I got a good pace going, and then focused on what my wife was doing to her mother. I didn't hold back much with Barbara, but Christy seemed to be taking out every silly childhood resentment she'd ever had on her mother's ass.
"Oh fuck, you bad girl, making mommy take it up the ass!"
"You love it you fucking slut!"
"How dare you call me that, just because I love it when your husband sodomizes me!"
"You are a slut, you fuck him every chance you get!"
"You're the one who invited me, you love watching him fuck you little perv! You're watching him fuck right now!"
"He's a man! He's supposed to fuck every chance he gets! YOU taught me that, because --" she gave an especially hard thrust -- "you're a SLUT!"
"You fucking love watching him mate. You're fucking my ass, and you still can't stop staring while he gives Anne that big, hard dick."
"The one you wish was up your ASS?" Christy said, giving another hard thrust.
"Oo, yeah, I do... your fake little dong --"
"Which you bought..."
"-can't compete with his actual living dick stretching out my back door. I take it, his sister takes it... Oof! What's it feel like baby girl, watching him fuck his sister? Watching your husband's dick, the cock you married, violating his own sister? Do you like watching him use her vagina, or stretch her shitter? Do you wonder if they've been fucking since they hit puberty? Do you imagine him coming home from a date, letting his sister suck his dick and guess if he got laid or not? Do you wish you'd grown up one door down from him like she did, with a dick she can't resist just a whistle away every night? What do you like better, watching your husband fuck his sister, or sending him off and waiting while he's out committing incest?"
"Start calling me your sister's name" Anne whispered, smiling over her shoulder at me.
"Oh fuck Debbie, fuck, your pussy feels so good. You love it, don't you? Do you love your brother's dick in your bare, wet little slit? Just like in college?"
"I'm so lucky you were my first, brother dear. Remember how I orgasmed when you first put that brother-dick in my virgin pussy?"
"Oh fuck yes, I thought you were dying! Then you made ME cum. Right in my sister's naked, clutching, incestuous pussy. I don't know what felt better, fucking you or feeding you my cum."
"Remember that next summer vacation, that first day? I drank so much of your cum I gained weight! That first day was what, seven times?"
"Eight if you count the load I put in your pussy, Debbie."
"Your girlfriend was so pissed when she tasted me on your dick. But you forced her to watch."
"And eat my load from my sister's wet snatch."
Christy screamed, pinching her nipples. Our little improv incest story had gotten her off while she was using the strapon on her mother. Barbara rocked back and forth, forced to do the work to get her ass fucked. Christy was too distracted. She kept moaning "fuck me big brother, fuck me!" while she watched me pound Anne.
"Oh SIS, your pussy feels sooo good!"
"As good as it did in the library in college?"