Been a long time coming, but I've finally written my first story! With many thanks to my fellow contributor and editor, mindslut, without whom this wouldn't have happened.
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As usual, he began by getting himself fully hard, using both hands to stroke and massage his leviathan as it gradually thickened and lengthened to its maximum. He knew he was unfathomably hung. It always pleased him to see the glassy-eyed stare, the slightly open mouth, the ravenous hunger in her eyes while he jerked himself to full size, building the anticipation of his inevitable entry.
"Almost 15 minutes to midnight. If you make it to the base before New Year, I promise to cum directly down your throat. You'd like that, wouldn't you?"
She could only nod in awed amazement, hypnotized completely by the sheer size of his weapon. How was it even possible for him to be this big? How had she managed to ever open her jaw wide enough to take even part of it in her mouth? How could she ever reach the base, let alone with only 15 minutes left to try?
"Get in position."
She laid back on the bed, rotated so that her head hung off the edge, allowing her to maximise the width of her throat as much as possible. It was a defenceless position from which she couldn't even see the monster cock about to spear down her gullet.
She looked at him upside down as he stepped towards her, his monstrous size throbbing powerfully in anticipation, his giant, heavy and full balls almost begging to unload. She knew from experience that when he came it was like a one-man bukkake, and those incredible balls were the source of his truly gigantic loads. She sometimes begged him just to let her sit and hold them, their awesome weight and size in her hands a constant reminder of his incredible virility.
If she managed to take his entire size this time, though? He'd finally cum down her throat, the thing she'd be craving for 12 months. To feel his epic flood of cum coating the inside of her mouth, feel it pouring down her throat and straight into her stomach. She knew she'd never taste anything better, that she'd be addicted for life. That she'd demand his cum on a daily basis.
He stood over her head, his fat, heavy balls resting on her chin for a second while his gigantic shaft swayed above them, allowing her to feel their heat and how they were already swelling. Already working to make the load he would shoot down her throat were she to succeed one of his biggest ever. If she didn't manage it, she knew he'd paint her whole body with his seed, marking her as his and only his.
She could feel the heat of his blood pumping through his thick weapon as it bobbed above her. Her mouth opened as she swallowed back the first wave of spit coating her tongue. Each breath in through her nose saturated her brain with the scent of his cock.
He positioned the tip of his horse dick just a few inches away from her parted lips. All she could see from this angle was cock. When she tilted her neck up, she noticed that her head wasn't even brushing his thighs. That realization made her squeeze her thighs together and whimper.
"Here we go. Remember... it's going to be too much. 15 minutes starts... now."
She opened her mouth as wide as possible as the giant tip pressed against her lips. With almost mind-numbing slowness, the gargantuan head edged forwards, millimetres at a time. She strained to stretch her mouth even wider as the tip flared towards the base. The corona of the tip of his cock was the absolute widest point aside from his base. She literally couldn't open her mouth wider, the edges of her lips feeling slight pain and almost cracking as his cock continued to utterly dominate her. He was only an inch or so inside.
With a sudden movement, he thrust gently and his enormous cockhead slipped past her lips and into her throat, along with the first few inches of his thick shaft. Immediately she felt her airway almost totally obstructed by his girth, and tried to breathe exclusively through her nose. Although his cock was filling her esophagus, the size of him put constant pressure against her trachea. She tried to concentrate on breathing slowly and not panicking, and he continued the slow but steady pressure, pushing yet more of his inhuman size into her throat.
Inch after inch of dangerously thick cock continued to slip forward. He had just over half his length inside her, already more than the size of an average penis. Unfortunately for her, nothing about this penis was average. Her view prevented her from seeing anything except the underside of his gigantic balls. She had no idea how much cock was left and was completely immobile, unable to do anything except keep her mouth wide and suppress her gag reflex. He was already so deep and so thick, she couldn't gag even if she wanted to.
"Mmm fuck that hot little mouth is so tight on my huge cock. You're such a good little fucktoy," he moaned as he kept applying the pressure, yet more length somehow pushing yet further down her gullet. He was approaching the furthest she'd ever taken, a good 2-3 inches from his base. All she could think and feel was him, feeling every bump and vein on his monstrous shaft as it totally filled her throat to absolute maximum. This was master level deepthroating; if it were a sport, his cock would be considered the Mount Everest of challenges. She was Tenzing Norgay and Edmund Hillary, climbing the last few hundred metres to the summit.