You're not going down without a fight!

Well, running from Sia probably isn't the brightest idea, taking in consideration that she's literally right behind you, so the only way you can hope to get out of this is to fight back. You've never been much of a fighter, nor have you taken on a model one on one, but hey, it's either that or giving up the sanctity of your asshole over to Sia. Gathering up all of the strength you can muster, you clench your right fist, quickly turn around to face Sia and manage to hit her square in the face. It felt like punching a brick wall, so you spend a few seconds trying to shake off the pain.

Sia seems completely taken off guard by the sudden act of **** from your part and stumbles back, pressing her hand against the impact spot. After the adrenaline has rushed off of you, you quickly realize that you hadn't really planned anything past this point. Your hand still hurts like hell, but you decide it's probably a good time to get away as fast as possible. Just as that thought crosses your mind, something grabs a hold of you. More specifically, your neck. As Sia wraps her right hand firmly around your throat, you can tell that she isn't too happy about what you just did.

She speaks up, slowly, quietly, but with a very intimidating tone "You little fucking rat. So you want to do this rough, huh?"

She starts lifting you off the ground with her hand still clenched around your neck. You start ****, but then Sia makes it even worse, by jabbing her left fist straight into your torso. You **** and cry out in pain, but no sound seems to come out, as Sia squeezes your throat even more. With her free hand, she rips your jumpsuit off of you completely and throws it to the side.

Then, with a powerful motion, she flings your body over to the direction of the couch. You land on the cushions, but can already hear and feel her heavy steps getting closer. Before you get a chance to scramble away, Sia gets a hold of your waist and pulls it closer to herself. She picks you up and plops your body over the armrest, your lower half facing her. She leans in and grabs your hair with her hand, pulling your top half up so that you're not just lying on the couch.

She brings your head up against her mouth and says "If you wanna be rough, let's see how you like this then..."

With her other hand, she guides her already pulsing hard member up against your sphincter and starts pushing hard on it. Without hesitation, she thrusts as much of her cock as she can down your ass, making you moan loudly both from the pain of her pulling on your hair and from her penetration. She quickly pushes her dick balls deep down your rectum, forcefully mashing your insides with her meat stick.

Sia grunts and pulls her massive cock back, before quickly smashing it in again. Her dick wasn't even properly lubed up, and neither was your ass, so the pain you feel is quite great. She starts forcefully fucking your anus with all of her strength, turning your ass red from the **** of her hips hitting yours. You wail out in pain again, but your cries fall on deaf ears as Sia increases her strength and speed with every thrust. Her thick footlong completely ruins your ass, making your stomach bulge from its size as it delves deep in your body.

After an excruciating amount of time, your ass starts going numb from the pain, and your mind starts going blanker and blanker by the second from Sia's painful fuck. Your eyes go half shut and your tongue rolls out of your mouth, as you get converted to a fucktoy. You can still feel Sia's giant member stretching out your rectum and you notice that it's getting hotter. Her cock starts throbbing and twitching, as she fucks you faster and faster. She starts literally jack-hammering her lengthy rod in and out of you, making your moans sound distorted as if driving over a bumpy road. Then, with a loud grunt and a yell, Sia finally plunges deep into you and cums. Her orgasm is powerful and sends globs of spunk flying deep in your insides. Your stomach gets filled up with her plentiful jizz and starts slightly expanding. Cum starts leaking out around her dick as it overflows inside of you. You just stay motionless and defeated and accept every ounce of her seed.

After a minute of cumming, Sia swiftly pulls her wet shaft out of your now quivering anus. Still holding onto your hair, she drags your seemingly lifeless body off of the couch and plants you on your knees somewhere on the floor.

She says "Come on pig, now clean off the mess you made on my dick. We're not going anywhere until it's spotless." Your mouth has already fallen open and your tongue is still sticking out the bottom, so Sia finds no trouble penetrating your mouth. Pulling you by your hair, she smashes your face in her crotch, sending her cum covered rod down your throat. You instinctively gag as the foreign object gets shoved down your gullet, but that doesn't do anything to stop her. You quickly find yourself pressing against her belly, as her cock finds a comfortable spot deep in your throat. Her girth stretches out your esophagus and covers your throat in the leftover cum from her last orgasm. You don't even slightly resist her, as you are practically broken, so she starts using your throat as a fleshlight. She pulls you up and down her thick, wet and veiny shaft, making a sloppy sound as your spit covers her member.

Sia starts full on throat fucking you, thrusting in your face just as strong and fast as she did with your ass. Strands of saliva and precum stretch from your face to her member, as your spit leaks out of your mouth and covers your face in wetness, making the throatfuck that much messier. Her weighty balls smack against your chin with each thrust, letting you feel the abundance of sperm still inside them. You barely get a chance to breathe, but that doesn't worry you, as you've now accepted your place as merely a fuckable hole. Your mouth gets formed into a perfect replica of Sia's cock, as it goes flying in and out of it with ever-increasing speeds. You taste her salty precum all over your mouth and as it lubes up your throat, allowing for smoother and faster entry. Sia starts moaning louder as she demolishes your pretty little mouth with her dick. She's already getting close to another orgasm.

She brings her hands around your head and starts shoving your face towards her even more, now only bringing out a couple of inches of her meat with every thrust.

You barely hear her, as your mind goes numb, but she says "Get ready bitch, I'm about to unload all I've got in you."

She finally presses down hard and buries your face in her crotch, letting her dick slide as far down your throat as it can. You start tonguing her balls, and you can fee them churning up a storm. Her cock slightly inflates, gets familiarly hotter and begins twitching as Sia lets out a roar of pleasure and cums again. She keeps you firmly planted at the base of her shaft, not letting you move an inch and making you swallow every bit of her thick sperm. The first load travels through her dick and shoots out of her urethra, blasting directly in your stomach. Your throat instinctively swallows every last drop of it. Volley after volley of cum jets come out of her dick and get planted in your stomach, along with the cum from before. Your belly starts growing more and more, as you chug down load after load of her thick and creamy nut. After holding you stationary for over a minute, she starts slightly thrusting in and out of your throat, still cumming at the same time. This makes some of her seed leak out of your mouth and drip down your face and body. However, most of it still gets absorbed by your hungry throat.

After feeling like you've just eaten a 10-course meal, Sia finally seems to be over with her orgasm. Her knees start slightly shaking as she slowly brings her dripping cock out of your mouth.

While doing this, she says "Ohh my god... I haven't emptied my balls like that in a while. Jesus, that felt good. Now here, take what's left, you slimy ratbag."

She pushes you off from her dick and throws you to the floor like a used condom. She starts jerking her lengthy dick and sprays out a few streams of cum over your body, quickly covering you from head to toe in her spunk. You lay there and pass out from exhaustion, unable to move or react.

After some time, you finally come to and look around you. The room is fully lit up again, but you see no signs of Sia. Your whole body hurts and aches in all of the places that you got used today. Your ass is still leaking cum and your body is still mostly covered in Sia's jizz. You prop yourself up in a sitting position and try to stand up.

As you slowly get to your feet, the speakers switch on and you can hear Alan speak to you. "Well well well, look who's awake. Seems like you had a pretty rough test, huh? Well, that's what you get when you start picking fights with the models. Luckily, Sia seemed pretty much unharmed, except for a slight bruise above her left eye. You, however, seem pretty tired out, don't ya? Well hey, when you're ready, go back to your room, take a damn shower and prepare for your next test."

The voice disappears and after a while, you manage to limp back to your room, defeated and ashamed.

You got the "Many regrets" ending with Sia.