It got better on the beach, just because now other girls were in their bikinis, although guys were still looking at her a lot. They walked for a while until the crowds thinned out, and Petra picked out a spot. They spread out their towels and sat facing the lake, watching the waves come in. Petra peeled off her cover-up, revealing a black bikini that Gretchen had to admit made her friend look pretty good. It wasn't as revealing as Gretchen's, but she was sure guys would be checking out both of them. Petra put sunscreen on herself, and handed some to Gretchen.
"Let me get your back," Petra suggested as Gretchen finished up her front. Gretchen laid down on her stomach and Petra squirted a bunch of lotion on her back and down her legs. Petra rubbed it all over her back, and then undid the top to make sure she got under it. Then she did the backs of Gretchen's legs, working her way up to her butt. Gretchen had to admit that it felt really good. Laying in the warm sun, the feel of hands rubbing lotion in, it was delicious. As Petra's hands got closer to her butt, she wondered what her friend would do. She knew it would be weird, but she was hoping that Petra would rub the lotion on her rear, it all just felt so good.
Petra did not disappoint her. She worked her hands up to Gretchen's ass, and then focused in on rubbing the lotion into her cheeks. She even pulled the suit up into kind of a wedgie to expose most of her friend's rear end.
"Leave your suit bottoms like that, it will give you a good tan." Petra laid down next to her. Gretchen re-tied her top, kneeled by her friend and returned the favor. She put lotion on her hands and started rubbing it into Petra's back and shoulders. Petra had wonderful olive skin, and her body was trim, if not as athletic as Gretchen's. Gretchen wondered to herself why Petra didn't dress more to impress. She certainly looked great in a swimsuit. Gretchen undid Petra's top to get lotion all over her back. She thought briefly about pulling her friend's top off, but remember the comment about exhibitionism being Gretchen's kink not Petra's, she thought better of it. When she was done with the back, she started working up Petra's legs, rubbing them a little longer than was strictly necessary, but she wanted Petra to feel a good as she did. She got up to Petra's rear, and she realized her heart was racing. She put more lotion on her hands and began rubbing, working her hands up under Petra's suit. She pulled Petra's suit up to make it more of a thong, and noticed that no tan lines appeared. "Hmmm," she thought to herself, "an unexpected side to Petra."
Petra reached back and pulled her suit in place, but she had a wide smile on her face as she thanked Gretchen, saying it felt really good. Gretchen laid on her back to soak up some rays. Petra leaned over and told her to spread her legs some, to give people walking by a good show.
"Wider. A little wider. Good" Gretchen's feet were now almost three feet apart, and she was sure that someone walking by would know for sure that she was shaved down there. The feeling of being exposed was making the pressure build up inside her. She propped herself up a bit on her elbows, and watched the lake and the occasional person walk by. She was definitely attracting attention from the guys who passed by. Most of them tried to look like they weren't staring, but some of them openly gawked. The whole thing turned Gretchen on immensely, and it was all she could do to not play with herself.
They girls flipped over after a while, and soaked up more sun. Soon they were both roasting hot, so they decided to go in the lake. In the only really acceptable way to get into a cold lake on a hot day, they ran down into the waves and dove under.
"Omigod, cold, cold, holy crap is that cold," Gretchen sputtered as she came up. They laughed at each other as they hurried out of the water. Gretchen looked down, and almost had a heart attack. She was naked! Well, alright, she wasn't naked, but the suit had become see through. Not wet t-shirt kind of see through, closer to Saran Wrap kind of see through. She could see how pink her nipples were, and the cleft of her sex was in plain sight. She might as well have been wearing nothing.
"Petra," she hissed, "look at me."
"Yeah it is a bit extreme, huh? It will go back when it dries out. But for now, get your hands down. Let's go lay down."
The walk back to her towel was excruciating, knowing how she was displayed. As soon as she got to her towel, Gretchen flopped down on her belly as quick as she could, but Petra made her roll over and spread her legs again. This time Gretchen covered her head with a towel. She just didn't want to see who was looking at her displayed like this. In her mind, she imagined the guys leering at her, the girls looking at her like she was a wanton slut, maybe the rangers coming up and arresting her. The thoughts led to darker fantasies and she was soon much more aroused that a person should be on a public beach.
"Let's go get a bite," Petra broke her reverie. Gretchen looked down, and her suit was no longer see-through, although it had dried conforming to her body. She got up and the two of them walked up the beach a ways to where there were some buildings and concession stand. As they stepped off the beach, Petra pulled on her cover-up, making Gretchen feel even more exposed. As they stood in line, Gretchen could feel all the eyes on her, although thankfully Petra carried most of the conversation, distracting her a bit from her exposure. They ordered a couple slices of pizza, and went and sat on a low wall facing the buildings..
"Keep those knees apart," Petra instructed as they sat. Gretchen sat with her legs spread wide and facing the exit of the men's changing room. Basically every guy who came out stared openly at her crotch. She looked down frequently to make sure that she was still legally covered, but even with that, you could see the folds of her sex.
After lunch, they went back to their towels, and soaked up the sun. Petra dragged Gretchen into the water again, and then made her do it two more times on her own. Each time the show she gave made her even hornier. The last time she came out of the water, Petra met her with all the stuff in her bag, and said they should go. It was after 4:00 by then, and the beach was emptying out, but the idea of walking to the car with the suit so see-through made her stomachs do flip flops. Gretchen hesitated, but Petra started off, not giving her any chance. She caught up, and they walked out to the parking lot. Gretchen saw many people do double, or even triple takes looking at her, and one woman even told her to cover up and called her a tramp.
