With some difficulty

Whilst forcing his cock into your back door Marcus meets some resistance from your tight hole.

He gives you a hard slap on the ass before shouting "loosen up bitch!" at you.

Despite this, you of course have very little control over the tightness of your asshole and even if you could loosen it, you're in far too panicked a state right now to manage it. However, Marcus continues forcing his unlubricated cock into your tight hole and makes some small headway. After some struggle, he manages to get the entire tip of his cock into your rear end and you feel your hole clench around the shaft of his penis. With the tip in, he starts slowly shifting back and forth, each time making it a little further into your hole.

The pain is intense as you feel your hole being stretched and his dry cock being rubbed against the walls of your rectum. Marcus continues thrusting for what feels like forever until eventually half of his massive cock has made its way into your virgin asshole, the whole time you've been squealing into the makeshift gag in your mouth.

"Holy shit this hole is tight boys." He announces to the crowd.

It won't be staying that way after he's through with you, you think.

"Alright I need to lube this up if I'm gonna make it any further." Marcus says.

As he says this he pulls his cock the whole way out of your asshole. Even after he's removed his cock from your behind you can feel a searing pain left behind from being used by this unnaturally large cock. Your hole feels like it's incapable of even fully closing properly now and you can feel it twitching whilst it's finally being left untouched again.

All of a sudden you feel Marcus release your hands and shift his weight off of your body, finally releasing you. The second he does so he steps towards your head and you look up at him confused as to why he's stopped early.

"Suck on it bitch." He says as he pulls the gag out of your mouth and lets it hang loosely around your neck.

You look at him confused and disgusted at the idea of putting this cock in your mouth after where it's been.

"No way! I'm not putting that in my mouth after it's been... there." You say, indicating your own asshole.

"Let me put it this way bitch, the wetter you get it with your mouth, the easier it'll slide back there."

Perhaps he's right, maybe if you do this vile act now it'll make your life easier in the torment to come.