Three nights later, they were at it again. "Are you sure you want to do this to me, son?" Betty asked. Lying naked on her stomach on the bed, she held her ass cheeks apart and winced as she felt Vaseline being applied to her puckered asshole. "I mean, we've only been having sex for a couple of days now. Are you sure we're ready?"
"I'm sure, Mom." Crouching next to her on the mattress, he carefully slicked the Vaseline in and around her tightly muscled asshole. He had already coated his dick with the petroleum jelly; it was completely hard, throbbing and pulsing against his stomach. "I mean it! I really get off on ass fucking a lot."
"Well, all right, darling. Whatever you want."
Betty relaxed on the bed and said nothing while her son lubricated her asshole liberally. She would have preferred to have him fuck her pussy, where she needed it most, but she wasn't about to protest, not when her wonderful Phil was making her the happiest woman in the suburbs.
They'd been fucking non-stop for the past three days, and Betty couldn't get enough of his perpetually stiff dick. It gratified her to know that they'd probably be fucking incestuously for the rest of their lives.
"Okay, Mom. Ready, if you are."
Betty nodded her head and stretched out on the bed. She reached behind her and again spread the cheeks of her ass, as wide apart as she could, completely exposing her puckered, Vaseline-slicked asshole.
"Be gentle, darling," she pleaded.
Phil climbed up on top of her. Holding his cock in his hand, he carefully fitted the spongy knob to the tight ring of her ass. Then he fell forward, gently impaling the first inch of his dick into the rubbery grip of her asshole.
"Unghh," Betty moaned. She felt her asshole walls stretching to accommodate the thickness of his big hard-on.
"Oh, darling," she gasped. "That does – unh – feel good! You can go deeper now up my ass!"
Phil placed his hands on her big tits and dig his fingers lustfully into the flattened globs. Then he gently humped his ass, gradually forcing more and more of his cock into the tight, sucking warmth of her ass tunnel.
It didn't hurt at all. Betty felt every inch of his dick going into her ass, but there was no pain. She trusted her son so much that she had reined completely, and relaxing was the only thing that could make asshole-fucking easy.
"You can stick it all the way in, son," she whispered. "It feels good to me. Really good!" Betty humped her pussy up off the bed, thrusting her jiggling ass checks onto Phil's cock. "Go ahead, darling! Don't worry about hurting me! Fuck my asshole!"
Phil grunted and rammed his dick all the way in, stretching her puckered asshole to the bursting point with the thickness of his cock. Feverishly, he began to pump his hard-on in and out, fucking deeper into her ass with every stroke.
"Harder! Fuck me harder!" Betty cried.
Deep, throbbing spasms poured through her asshole, wetting her pussy and stiffening her nipples. Betty eagerly pumped her hips up off the bed and tried to spread her blushing ass cheeks wider apart. "Oh, that's so good! You're making me so hot! Fuck meeee!"
"Play with your pussy!" Phil demanded hoarsely. He delivered a sharp jarring thrust of his cock into the depths of her asshole, sending hot tremors through his mother's trembling body. "Go ahead, Mom. I want to see you cum. Jack off your cunt!"
Betty thrust her hands under her hips and searched for the aching slit of her pussy. She eagerly slid two fingers into her sopping cunt and stroked them in and out, at the same time rubbing her thumb across the burning nub of her clit.
Phil increased the fury of his humping, ramming his throbbing cock into her asshole as hard as he could. Betty felt spasms of cumming flowering simultaneously in her ass and pussy. She shrieked wantonly and jerked off her cunt like a bitch in heat.
"Fuck meeee!" she cried. "I'm cumming, son! Oh, God, yes! Fuck my asshole! Yes! Fuck me with your big dick!"
Violently, the spasms poured through her body, making her asshole muscles contract around Phil's cock. Phil groaned and fell forward, ramming every inch of his throbbing dick up her asshole.
White drops of jism spurted from his cum slit, bathing his mother's asshole with cream. Gushers and gushers of cum, squirting out of his fat spongy cock head, followed, and poring into the rubbery sheath of her ass.
Phil moaned as he worked his cum-spurting cock between his mother's blushing ass checks. Betty sighed and clenched her asshole muscles, drawing every drop of cream from his aching balls.
We will be together always, she thought, smiling and shutting her eyes. In a way, she was almost happy that her husband had died before he could have witnessed the fever of their incestuous fucking.
He would only have interfered.