Caught looking and brought into the yard.

I watched through the gate as the bronze-tanned redheaded brother and sister pleasured each other. Sally was crouched down on all fours with her head down on top of her folded arms, while Sal kneeled and bent down behind her.

Sal opened his sister's outer pussy lips and stroked her damp inner folds and her swollen clit, big and round as a fingertip.

"Ooooh," she said.

Sal turned his head sideways and tongued Sally's wet, open pussy lips. He pulled back for a second. "Mmm, sis, I like how you taste after you've been for a good run," he said. He bent his head down again and kissed his sister's pussy before starting again with his tongue.

I reached a hand inside the leg of my shorts to adjust the soft nylon webbing inside which was uncomfortably bending my growing erection.

"Aw...." she sighed. "Oh yeah. Just a little more." She tilted and rolled her hips gently at the touch of his tongue. She twitched. "Ooh, not there you're gonna make me pee!" She turned her head round toward Sal, but her eyes met mine looking through the gate. Sal adjusted his tongue strokes. "That's good," Sally said. "One more thing, Sal. Could you get up and open the gate for Steve so he can get a better view?"

I froze, caught dead to rights. Sal rose and walked toward the back gate with a big grin, looking at me standing with a hand inside my shorts. His own erection, slim, firm, and upward-pointing, bounced gently as he moved.

The gate scraped open, and I took a deep breath, my power of speech returning.

"Fair's fair, Steve," Sally said to me. "Drop the shorts. We showed you ours."

I looked from Sally's face to Sal's and back. They were waiting expectantly. I glanced nervously toward the house and back into the utility access path where I'd been standing looking at them.

Dead to rights. I took a deep breath, let it out, then lowered my shorts. My penis sprang up.

"Hey cool," Sal said. "I think it's bigger than Dad's."

"Yeah!" Sally affirmed. "Thicker anyway. Hey Steve," she addressed me, "I don't mind if you watch us, just don't try to hide. I'd love to watch you stroke yourself off watching us."

"Yeah," said Sal. "We like to be watched if it turns people on, especially if they get off." His erection was still hard.

"Unless you want to join in?" Sally says. "I'm teaching Sal how to rim me. Dorothy, y'know the little dyke cowgirl next door to you, she did it on me and I found out I love it. If you're good at it, maybe you could show Sal?"

I'd never brought it up with Lisa, since she was uncomfortable with her butt to begin with. When she gained a few pounds, she got even more shy because she thought all the pounds went straight to her butt. I loved the idea of rimming my wife's cute little butthole, but she'd only let me get as far as playing with her ass a few times in the shower. And here Sally was inviting me.

Lisa. I didn't want to make her wait TOO long for her ice cream. Maybe I should just watch?