Offer her a taste

"You want to taste it, don't you?" He told her softly, his thumb caressing her lips. "You want to feel that fat cock in that pretty mouth of yours?"

She bit her lip. "I've never... I've never done that."

"You've never sucked a cock?" He asked, deliberately coarse. He loved the way she blushed.

She shook her head, but despite her words, she did not resist when he pushed his thumb between her lips. They parted easily, and he rubbing his fingertip against her wet tongue.

"You want to learn?"

Her lips curved into a nervous—but definitely interested—smile. "OK."

He grinned. "I'll teach you, then. Sit right here," he said, pointing at the floor between his feet. Meanwhile, he took off the rest of his clothes and flung them aside, already forgotten.

"We'll start slowly. Give it a lick, first."

She took a deep breath and then did as he told her. A heavily pregnant girl half his age was about to suck his cock! It was all he could do to keep from moaning. She pulled back after just a split second, brow furrowed as she assessed the taste.

"It's... salty." Her voice betrayed her ambivalence.

"Do it again. A little longer this time."

He continued with his instructions, telling her first to lick the shaft, then the head. She got used to the taste quickly, and even seemed to develop a taste for it, smacking her lips after every lick. Then he got her to take the tip into her mouth, just briefly.

Her eyes widened as she closed her lips around it, struggling with the size. He'd warned her to avoid grazing it with her teeth, but was not surprised when he still felt them.

She spit it out quickly, wiping a bit of drool from her lips. "Sorry, it's just—"

"Don't worry, it's OK," he reassured her. "You're doing an amazing job. Want to try it again?"

She nodded.

She leaned forward and took his glans into her mouth again. She knew what to expect now and held it for longer now. Then she surprised him by pressing her tongue against the sensitive underside and giving it a lick.

"Fuck," he groaned. "That's perfect, keep doing that!"

Her lips curled into a smile of pride and she did as he asked, exploring his cock with her tongue as she held it in her mouth. He continued giving her tips, about creating a vacuum with her lips, to put her hand around the shaft, not to neglect his balls, and to vary the actions of her tongue and lips.

She released it frequently for breath, and looked surprised when he suggested she didn't have to wipe her lips every time she did so.

"I like it when things get a little messy," he said, and grinned, feeling oddly embarrassed at the admission.

"Is that why you said to spit on it, too?"

"Well, it helps make things feel slippery too," he said.

"Oh, right. Um, should I spit on it now?"

He blinked. "Sure. If you want."

She didn't hesitate, letting several large globs of spit drip down on the tip of his rock-hard cock. It jumped with excitement and she giggled with delight.

"Now suck it some more," he groaned. "Fuck, yes, suck that cock."

She was a lethally quick study. He rarely had to tell her anything twice, and soon she was sucking on his cock like she'd never done anything else. After some encouragement on his part, and a lot of blushing on hers, she began to make some noise too, slurping and moaning with genuine excitement. She massaged the shaft with both hands, shining with the slime of their mixed juices.

He was as erect as he'd ever been. Here was a 19 year old girl on her knees for him, hugely pregnant with some pimply idiot's fertile cum, slobbering on his cock for all she was worth. Drool dripped from her chin and clung to her top in thick globs, creating noticeable stains. As much as he tried, he knew he wouldn't be able to hold on for much longer.

"I'm getting close, baby."

She glanced up at him, a flicker of fear in her eyes.

"Can I cum in your mouth?" He asked. He really wanted to, but he didn't want to ruin things right at the last moment by pressing.

She looked unconvinced for a several long seconds, but then gave a small nod.

It was that little nod that did it. He loved cumming in a woman's mouth, seeing her drink down his juices, and to see her agree to take it willingly... it was the last straw.

"I'm cumming," he groaned. "Don't stop! Here... it... comes!"

His balls contracted and the first jet of cum rushed out, up through his cock, and into Nancy's mouth.

Startled by the blast, she spit out his cock, but she recovered quickly and hastened to catch the second one between her lips. Then she had a vacuum seal around his glans again, and sucked out the remainder of his cum, moaning as if it was a particularly tasty delicacy.

In fact, she didn't stop until finally he had to push her away, her attentions suddenly far too intense. He let himself fall back, taking slow, deep breaths.