Now he turned his attention back to the sight inside the house. Tina was moaning like crazy. "There! There! On my clittie! Mmmm, do it! Do it there! Lover, that feels so good!"

"My baby has the tightest, wettest pussy in the world," Bob said. He pulled his head back and lowered his mouth to her tits.

Billy sucked in his breath. He caught a glimpse of Tina's tits. He knew they were big, but he almost blew his wad when he caught sight of them. They were so damn juicy-looking he worked his mouth like a nursing puppy.

Tina and Bob changed positions. They lay on their sides and Bob had one leg flung over Tina's hip. Billy could see everything now. He could see Bob's cock slicing in and out of Tina's thick-fuzzed cunt. He found out in one split second that Tina wasn't a natural redhead and that she had a gash that a guy could get lost in. Every time Bob pulled out, Billy could see all the little flaps and crevices of his aunt's snatch. Girls were so damn different from guys!

He touched his fly. His prick was wedged in tightly against the denim of his jeans. He felt a dampness emanating from the tip and wondered if he'd be able to control himself until he got back to his room.

Now Bob suddenly moved Tina around on the bed until she was positioned on her hands and knees. Billy's eyes bulged as he watched him place his hands on Tina's hips and push her ass up in the air. Was he going to give it to her in the back-door?

Billy had heard about ass-fucking. He was anxious to try it. Not that he'd had much experience with gash. Anyway, a guy could never get tired of gash. Still, the idea of ramming his dick into his aunt's asshole brought a smile to his face.