Taylor joins Brandon to watch Madison and Zack

"Oh!" Brandon heard, then, "Ohhhh." followed by a low chuckle. That low, sexy voice. Taylor.

Brandon fumbled to hide his cock, but the stiff erection poking out of the leg hole of his shorts was too awkward to put away. It even seemed stiffer now.

"Don't put it away on my account," Taylor said. "Your sister. My brother." She chuckled. "With our Spring Break crowd, if they don't get a room, they should expect an audience."

"Uh," Brandon said.

"Oh-oh-oh!" Madison's voice rose from outside through the partly open door.

"I don't blame you," Taylor said. "Looks hot." Taylor walked closer to where Brandon stood, looking out at Madison and Zack out on the deck. "And we both want the same thing."

"Huh?" Brandon said.

"We don't want Zack to break Madison's heart," Taylor said.

"Yeah," Brandon said.

"So let's watch," Taylor said. "Keep them out of trouble." She stood beside Brandon. "She on birth control?"

"Um. Yeah," Brandon said. His cock throbbed again. He'd stopped stroking it, but it was Not Going Down.

"At least somebody has some sense," Taylor said.

Out on the deck, Zack and Madison were in an intense standing make-out session, full of fast, heavy breathing, sloppy kisses, and hands that had stopped roaming and were concentrating in a few special places. In the dark, it was hard for Brandon to see what exactly was going on, but it didn't take much imagination.

"Chair," Madison said urgently. She took Zack by the shoulders, turned him around and walked him backward toward one of the chairs on the deck, sitting him down.

"This is like before," Brandon said.

"Before?" Taylor said.

"Today. You were in your room. Zack and Maddie were going at it in the living room," Brandon said. His cock was harder yet, without touching it. "I told her to cut it out. She told me to go to hell. Lisa saw too."

"Oh," Taylor said. "Poor Lisa. Damn it, Zack. Get. A. Room. The living room in broad daylight?"

"We, I mean..." Brandon said. "Lisa and I decided to support them."

Taylor reached out and put a hand on Brandon's shoulder, giving him a firm squeeze. "Good," she said. "It could just be a fling."

"Uhn," Brandon grunted. "But if Maddie wants to mess it up, it's up to her."

Madison had straddled Zack and was easing herself down into his lap, facing him. "Ohhh, you're big," she said.

Brandon flashed back on the image from earlier today. Zack's big cock stretching his sister's cunt. He put a hand on his cock and started squeezing the shaft.

"Let me get you some paper towels," Taylor said. She gave his shoulder. "Don't go anywhere."

"Uh?" Brandon said.

"Unless you want to take a break in the bathroom to give yourself a hand," Taylor said.