The upper deck

Steve couldn't speak for all cruise liners, but the one they were on had a very special upper deck. He had noticed it in passing while reading about their trip, but he had not imagined that he would actually be visiting it. It was for 18 and over only, and clothing was optional.

Luckily Becca was being anti-social and talking to her college friends, so Amanda told the girls to get their swim suits, the rest of them were going swimming. Both barely legal girls were eager to get out, but had no idea that the adults had plans for them.

Erin noticed when Steve used his key card to buzz into the stairway that read "Adults Only" but said nothing. He really wasn't sure what to expect, but it wasn't a deserted pool deck. Much to his surprise, the upper deck looked just like the regular pool area, except quite a bit smaller and it was completely void of guests.

"What is this?" Erin asked.

In answer, Steve tossed his towl on a beach chair and let his trunks fall to the floor. He watched the eyes of all three of the others go right to his cock. He felt like a piece of meat on display and he liked it.

"Dad!"

"Hey, clothing are optional on the upper deck," Stephen said with a smile. "Your mother and I thought that since you saw us, we should get to see the two of you."

He had never been naked outside before. He liked the feeling of the warm sun against his skin.

Morgan wasn't wasting any time, she already had the shoulder straps of her one piece in hand and was sliding it off. Stephen watched as her fat boobs bounced-god, he wanted to lick and suck on them so bad-and then she stood up, completely naked. He eyed her up and down, remembering the taste of her pussy.

"Its up to you, baby," Amanda said as she shed her bikini.

Stephen stepped into the hot tube and dropped down into the water. He sat down and turned to watch Erin as she debated what to do next. He hadn't seen her naked since she was three or four and started taking baths for herself, and at that time he never imagined there would be a day when he would want to see her naked again.

In the conservative slightly loose fitting black one piece she was wearing, it was impossible to tell exactly what kind of body she had. Morgan was what most people would call fat. Erin appeared to be less fat and more thick. He suddenly wanted to see her very badly.

"I don't know, mom," Erin said nervously.

"Would it help if your father helped you?" Amanda asked.

Stephen felt a stirring in his crotch when she nodded. Slowly he got to his feet and stepped back out of the hot tub, and once again all eyes went to his cock. He stepped behind Erin and paused. She shifted and her swimsuit clad ass brushed against his cock. He scent of either he shampoo or body wash flooded his senses.

"Its okay if you want to keep it on," he whispered in her eyes. "There is absolutely no pressure here."

"I want to," she said. She leaned back towards him and his cock, which was now only partially limp, was pressed against her ass. She blushed but didn't pull away. "I'm just scared and need your help taking the next step."

Stephen swallowed as he grasp the straps of her swimsuit and slid them off her shoulders. It had been years since he had undressed a woman, and was reminded of how it always felt a little like unwrapping a Christmas present.

He reached around the front to grab the front of her suit, and for just a moment he was holding her large breasts in his hands. He could feel her hard nipples through the fabric. By the time he freed them, his cock was no longer semi anything, it was now rock hard.

As he swimsuit reached her waist, Erin took it from him and bent down to slide it over her wide hips. She revealed her beautiful thick ass, then bent full over as she stepped out of the one piece. As she did, his cock slid down her ass crack and between her thighs. For a second he could feel her pubic hair on the head of his cock and he realized all he had to do was push slightly forward and he would be inside of her.