His tongue entered her mouth, at almost the same moment that his fingers spread her pussy flaps and the tip of his middle digit cased delicately into Mary Jo's cunt. Her eyes bulged in shock at the feel of his finger entering her cunt, but he wasn't rough or crude at all. In fact, he was even a bit gentler than when she fingered herself.

"Oh, you have to stop," she whispered, spreading her legs a little more.

The spread of her thighs seemed to tighten the snug of her cuntlips around his fingertip, and the sensations moved from exciting to thrilling, almost in a heartbeat. His finger pushed a little deeper into her cunt – as deep as he could get it.

"You're a virgin?"

Mary Jo nodded.

"I thought you might be," he added. "You're so pretty, but so shy. I kinda doubted that anybody had ever put a cock inside you. Fingers?"

"Just-just my own," the girl stammered, blushing.

Zack grinned and kissed her on the mouth. Mary Jo groaned as he licked the edges of her own lips, his tongue tickling an almost-insane frenzy into her flesh.

His fingertip was still wedged between the lips of her cunt, sliding in and out in shallow, insistent strokes that warmed her pussy and made it ooze sticky gobs of arousal. He rubbed a wet finger against her clit. She squirmed, strained, tried to get free, but feeling strangely unwilling to put up that much of a struggle.

"No, you mustn't!" she said weakly as he pulled up her top.

Under it, she was wearing only a very flimsy bra – her favorite, because it softly cuddled her tits, but it was so sheer that it hid nothing, and she blushed as he looked down at her rosebud nipples showing through the nylon cups.

"You have sweet tits," Zack whispered, bending down to kiss her nipples through the filmy bra cups.

Mary Jo gasped at the touch of his mouth. She strained, arching upward. His mouth opened, the tip of a tit sliding in. His tongue began to lap around her swollen nipples, wetting the nylon bra-cup.