Use her as a willing cum dump as you had planned

Now was the time to finally enjoy the fantasy! You took a moment to stand up and steadily undress. The moment your thick new cock sprung out from your pants, you noticed her eyes widen. You chuckle at her reaction, dangling it at the foot of the bed and spreading her legs open with your knees. She looked hot and ready for a very long and very satisfying screwing session, and with the new look of ecstasy on her face, you knew she was going to like it.

"Since you're such a nice host, I'm gonna be nice and play along. You're gonna let me fuck you and you're gonna let me cum as many times as I want, since you're such a slutty little bitch in heat, looking at another man's cock besides your husband's." Your highly erect member throbbed with every second of your proclamation, tapping against the base of her crotch as you pull her to the side of the bed. You shove the fabric of her panties aside to take aim, "You wanted my dick, Susie? Here, take it!"

With a heavy thrust of your hips, you bury your 8 inch rod deep into her slit, immediately prompting a loud grunt to escape out of you. Her pussy was extremely warm, your thick meat reached inside to the base. You had never felt anything like this before, the tightness of a cunt so awesome that wrapped so nicely around your length. The moment you slammed it in, she arced her back and let out a strained moan, and as you begin to buck your hips, you watched her huge titties bounce around. She could not control her voice as you fucked her, face rolling around all over the place with her arms flopped uselessly to her side.

"Oh fu-! Oh god! Ungh! Ungh! Fuck!" Her voice screamed out.

"Yeah! You like that, Susie? You've been waiting for that dick, haven't you? You like that dick, slut?" You grin at her, "If you like that, you're gonna love this! Take my cum, Susie! Gonna cream your slutty little cunt!! UNGH!"

You ram deep in her again, unleashing your load in heavy bursts into her. The pleasure you were feeling was overwhelming. With each burst, you feel like you were in heaven, being squeezed and milked by her tightening fuck hole. You could see her arc again, screaming out and convulsing, her eyes rolling back as her mouth gaped open. After unloading your last spurt, you breath and chuckle to yourself. You had just came into the real pussy of the object of your sexual fantasies. The enjoyment of your conquest was giving you a new high, and as your stamina was unlimited, you started fucking her again, hands grabbed onto her boobs.

"Oooh, that felt good! Such a lovely fucking pussy! You want more, slut? You want more? Take it, cum slut! Take it!"

You were going out of control, like an animal stuck in a rut. You could not get enough of her. Every time you moved your hips, it felt like your dick was being sucked in, the hole leaking out the sperm you had previously dumped inside her. This time however, you could see her face was lost in a wide pleasured grin, eyes rolled up and hands locked over her head.

"Uh! Uh! Uh!" She moaned, and suddenly from out of nowhere, she became more vocal, "Yes! Ungh! Fuck me! Fuck my tight little cunny! Yeah!"

"There, see? There's the cum slut I saw! Horny fuck meat like you can't hide her real cock loving side forever!" You laughed evilly, "Does it feel good when I fuck your pussy, Susie? Does it feel good when I shoot my hot load inside you?"

"Yes! Oh yeah!" She was screaming now while bucking back into you, "I don't fucking know why but fuck! I want your dick! I want your hot sticky man juice deep inside me! Fuck me! Ungh! Yes!"

Encouraged by her transformation from faithful wife to willing cum dump, you pick up your pace and waste no time to cum again, burrowing your dick in her depths while spurting out your new load with abandon. Her tongue lolled out as her back curled again, gyrating uncontrollably in a massive orgasm, before flopping uselessly onto the now sweat and cum stained sheets, her face contorted in a visage of **** pleasure. She looked too weak to manage words, but her hands that were rubbing her tits indicated her body could take more, to your absolute delight. Her well fucked hole was now dripping with your sperm, liberally sliding down onto the floor in a puddle. You pumped a couple more times lightly, keeping your dick inside her, prompting her to convulse with every thrust.

"Such a greedy cum slut, craving for cum..." You whisper to her ear, "Your husband's dick not enough for you, Susie? Looks like I'll have to fill in for him from now on, eh?"

She could not muster the strength to reply, still spasming from her last time in space and back. It was a delightful expression.