She slipped behind a tree and peeked out, wanting very much to observe the act to the conclusion, to see the horny teen squirt his jism all over the bushes.

Jimmy was kneeling, head and shoulders thrust back and belly thrust out. His prick stood out hugely and his fist ran up and down the cock lance rapidly. He was evidently enjoying the sensation, Brenda thought, because he was smiling. She fixed her gaze on the swollen, purple head of his cock, waiting eagerly to see it blossom with jism. Although she'd never watched a guy shoot off, she had a good idea that it was going to be a truly thrilling spectacle.

Brenda was wearing a sun dress.

As she peered around the tree, she suddenly realized that she had cupped her hand over her crotch automatically and was giving her excited pussy a nice squeeze.

Well, why not? What better time was there for a girl to masturbate than while she spied on a guy beating his cock meat?

But she didn't want to cream in her panties or to get cunt juice on her dress. She raised the hem of the flower-patterned sun dress and tugged her bikini panties down around her thighs. The elastic stretched tight, like a hobble, as her legs parted. She cupped her cunt mound again, naked this time, and began to rub and squeeze. Her clit seemed to explode in her hand and she gave a little gasp of pleasure…

And Jimmy heard that gasp!

The teen looked around quickly, giving Brenda no time to duck back out of sight. When he saw her peering around the tree, he turned bright red and trembled with shame.

He looked down, as if to make sure that he had been doing what he thought he had been doing – and blushed even deeper as he saw that, sure enough, his cock was in his hand.

He was still stroking his prick, in fact. Despite his horrible embarrassment at getting caught, he was so used to jacking off that his hand had continued to pump merrily away even after he had spotted Brenda.