The sun was beating down on the water park as Dan and Shir arrived, both dressed in their swimsuits. Shir was wearing a red bikini that hugged her curves in all the right places, and Dan couldn't help but stare as she ran off towards the tallest water slide. Her tits bounced in her bikini top with each step she took, and Dan felt his dick start to twitch in his swimsuit.
At the top of the slide, Shir leaned against the railing as she waited in line. Her bikini top slipped down, exposing her nipples, but she didn't seem to notice. Dan got a clear view and couldn't help but feel his excitement grow.
Shir slid down the water slide, her tits slipping out of her bikini top again as she splashed into the pool below. Dan watched as she got out of the pool and walked over to him.
"Hey perv, you enjoying the show?" she said, playfully insulting him. Dan blushed and stammers out an apology. Shir laughed and asked him to cover her as she adjusted her bikini top.
As Dan helped Shir, he couldn't help but notice the bulge in his swimsuit. Shir noticed and raised an eyebrow. "Someone's excited," she said, grinning.
Shir invited Dan to slide with her, and he agreed. They climbed up the stairs to the top of the slide, and Shir sat in Dan's lap. As they slid down together, Dan pulled his swimsuit down so that Shir was basically sitting on his dick, unknowingly.
During the slide, Dan untied Shir's bikini bottom. When they hit the water, Shir's ass and pussy were exposed. Dan pretended it was an accident, and Shir was surprised by his huge dick. "Well, someone's definitely enjoying themselves," she said, grinning.
Shir got out of the pool and adjusted her bikini. Dan couldn't help but stare at her curves, and Shir noticed. "Eyes up here, perv," she said, laughing.
Dan and Shir continued to enjoy the water park, with Shir teasing Dan and Dan trying to hide his excitement. As the day came to a close, Dan couldn't help but feel grateful for his hot sister and the memories they made at the water park.
"Thanks for today, sis," Dan said, as they were leaving the park.
"No problem, perv," Shir replied, grinning. "I'll have to keep an eye on you next time."
Dan couldn't wait.
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