Take a ride on her shaft.

Sia playfully hums in your ear, as you try and figure out what to do now. You can feel her hot shaft resting on your back but you can't help but wonder how it would feel inside of you. You want an even closer connection to Sia. You want to be one with her, and you think you know just how to do that. You start brushing your backside up against the throbbing member on your back. You feel the sticky precum leaking out the tip covering your back in itself. You want this thing inside you as soon as possible.

Sia notices your enthusiasm and says "My my, aren't we eager to get things started? I know what you want, so I won't keep you from it. Come on baby, mount me."

Her voice sends shivers down your spine and you start feeling hot. After saying what she had to say, Sia takes a step away from you and lays down on the floor, her erect penis standing tall like a mast. You turn around to face her and try to feel around your way in the darkness. Once you clearly feel Sia below you, you squat down and take a seat on what seems to be her washboard stomach.

Sia reassures you "Take it slow at first so that you don't hurt yourself. Actually, you know what? Turn around and bring that pretty ass closer to my face."

You don't know what she has in store, but you obey nonetheless. You turn around and bring your butt right over her face. You feel her hands grip your ass cheeks tight and pull them closer to her. Then, you feel something wet up against your sphincter. It's Sia's tongue! She starts licking all around your asshole and slightly pressing her wriggling tongue inside. You quietly moan to yourself from the amazing analingus that Sia's performing on you. She coats the inside of your asshole and everywhere around it in spit, lubing it up for what's to come.

After a few minutes of preparation, Sia says "Alright, now let's get back on track. As I said, don't rush it."

You turn around and your ass goes back to sitting on her stomach. You can feel her pulsing member behind you, so you scoot backwards and prepare for entry. You lift your ass up to Sia's shaft's very tip and slowly but surely start lowering yourself down. Her thick cock head presses against your anus very hard, but due to its pointed shape, it begins slowly sliding in. Sia's lathering session really helped, and in combination with the precum leaking from the tip, your ass swallows her tip beautifully. As the head pops inside, both you and Sia let out a small yelp, surprised by the sudden sensation. Your asshole stretches out pretty wide, as her shaft is as thick as your fist, but you bare with the slight discomfort for now.

After successfully penetrating yourself with Sia's cock, you start moving down more and more. You slowly inch your way down her shaft, feeling every bump and vein pass by your sphincter. You want her cock inside of you as fast as possible, but the pain and discomfort are keeping you from dropping straight down her length. As you travel deeper down her member, you can feel brush up against your prostate, making you get hard almost instantly. It pushes your insides around and makes itself prominent in your rectum. You feel like you've only taken around 5 or so inches, but the end is not even close. The ever-flowing stream of precum coming out of the tip is guiding the shaft deeper and deeper down into you without any setbacks.

After making it halfway down Sia's cock, your ass already feels filled up.

Sia recognizes that you're having trouble and says "Hey, you don't have to take it all in one go baby. I know that you're eager but work with what you have now, and stretch yourself out so that you can take it deeper later."

You appreciate the advice and start moving back up her shaft up to the tip. The feeling of her girth sliding out of you is a tingly one. You feel her shaft firmly press on your prostate, making your hard cock twitch in pleasure. After reaching the tip, you start sliding back down to the halfway point of her dick, feeling her hugeness inside you again. Slowly, you start building tempo, sliding up and down her shaft. You hear Sia let out a moan, which makes you happy, knowing that you're doing well to pleasure this sexy creature. This gives you the energy to start riding her cock even faster.

After bouncing on her cock for a fair while, you start feeling reduced stress on your anus, making the riding much more pleasurable for you than before. However, this only means that it's time to go deeper. You go back down to the well acquainted halfway point of her cock but instead of sliding back up, you slide ever so slightly downward, taking more of her inside you. After sliding about an extra inch inside of you, you pull back up and slide down again, even deeper this time. Repeating this process, you slowly start making your pilgrimage to the base of Sia's cock. You feel the familiar discomfort of a cock pressing its way inside you, but you accept it and move on. Her tip reaches ever deeper parts of your rectum and it even starts visibly poking out from your stomach, forming a bulge to signify how deep it's gone.

After an uncomfortable but gratifying while of taking Sia's cock deeper into yourself, your ass finally makes contact with her hips. You relax your body and take a sit right on Sia's shaft. You let out a sigh of relief from finally conquering her giant dick and let it sit inside of you for a moment.

As Sia speaks up, you can clearly hear a lustful tone in her voice, letting you know that she's just as much into this as you are. "Wow, the whole thing! I'm proud of you baby, but let's keep the momentum going. Come on, no slacking."

You quickly gather your energy and follow Sia's command. You start bringing yourself back up her thick shaft and reach the tip once again. Then, you try sliding all the way down her length as fast as you can. The sensation is moan inducing, but you don't stop yet and go again, sliding up her shaft and back down again, slightly quicker this time. You start bouncing up and down Sia's meat mast until you're riding her at the same speed as if she would be fucking you.

Moans and sounds of slapping skin fill the room as you ride Sia like there was no tomorrow. She's holding your ass cheeks and slightly pulling you up and down as you go. Your anus gets stretched out to perfectly envelop Sia's cock every time it enters your depths. The amazing prostate stimulation, along with knowing how much pleasure you're bringing Sia, get's your whole body red hot and horny. You drop yourself on her lengthy cock as fast as you can, taking it all inside you every time and enjoying the feeling of it stretching you out. Your own cock gets throbbing hard from the pleasure and you can swear that you're getting close to orgasm. You have noticed that Sia's cock is throbbing more and more and you can swear that it's gotten bigger since you first put it inside you, meaning she can't be far off herself.

After multiple more minutes of hardcore cowgirl action, you start feeling the pressure building up inside you. Sia's cock get's noticeably hotter inside you as well. You can't wait to be pumped full of her thick and creamy seed like the whore that you are. You start bouncing up and down with all of your strength and speed, and Sia seems to be using her strength to make you go even faster, both with her hands and pelvis slightly bucking into you.

Her breathing picks up dramatically and she says "Oh yeah baby, I'm going to cum! That tight ass of yours is sending me over the edge! Get ready!"

Her voice makes you go into a lustful craze and your whole body focuses on getting Sia to cum faster. You put your hands on her C cup breasts for stability as you fill your ass with her cock as fast as you can. Then, with a loud groan from Sia, she slams you down balls deep and finally blows. A torrent of cum enters your anus and you feel its warm and thick texture filling you up. It feels amazing and you can't hold your orgasm off any longer as well. You start shooting jets of jizz from your cock all over Sia's torso and face. This doesn't distract her as she's too busy cumming. She twitches in pleasure as more and more of her cum get's pumped into you. You feel her balls tightening with every load that she leaves in you.

Your orgasm is already over, but Sia keeps pumping you full for another full minute. After you finally feel her orgasm stop, you slump down on top of her and rest with her giant cock and pool of cum still inside of you. You both must've dozed off to sleep because when you open your eyes, you see the room fully lit up again. Sia still has her eyes closed but opens them right after you do. She looks at you with a smile on her face and so do you.

She says, still in a quiet voice "Hope you got what you wished for. I know I sure did."

She leans up to your face and kisses you on the lips. You lean in and start sensually kissing Sia for a few seconds. When the kiss breaks off, you slowly begin to lift yourself off of Sia's softened shaft until you stand back up on your own two feet. Her member plops out of your asshole and lands between her spread open legs, and along with it comes a stream of cum that leaks out of your ass, deflating your stomach of semen. The cum that leaks out of you covers the floor beneath you. You walk over to the couch and take a seat since standing is a bit too painful at the moment. Sia is quick to follow and joins you on the couch, wrapping her arm around you.

As you share a moment of peace together, Alan addresses you both through the speakers. "Well, what can I say. Great test! Although things didn't go 100% according to plan, Sia managed to show that she can leave people paralyzed from her presence. Hope you two enjoyed yourselves, but it's back to testing as soon as you're done here. See ya in the next one!"

You spend another minute resting close to each other, before finally returning to your rooms.

You got the "Hard silence" ending with Sia.