This story continues from My Girlfriend's Dirty Past part 2 and it would be best to read that first.
I woke up with a bit of a start and looked across to see Helen, still topless and searching in her bag. Dave also stirred beside me and looked up at her and smiled slowly as if he had just recalled where he was and the fun we had just had. Helen glanced over at us both and smiled a cute smile and said,
"Hello boys, remember me?"
"How could we forget darling." Said Dave softly.
"You've both been asleep for over and hour, something must have worn you out!"
"I'm sure you could help us up again though, Helen!" Said Dave, enjoying yet another lingering look at her slim body, topless in the sunshine.
I sat up and asked her what she was looking for,
"I was just checking again for my bikini, but it's definitely not here, I thought it might be in the other bag, dammit."
"What are you going to do?" I asked.
"Well, I really fancy a quick dip before we go back, I'll just have to go in my knickers." She said.
"That would be nice!" Said Dave cheekily.
Helen smiled at him and said,
"Would you like to see them?"
"I would love to see your knickers, Helen!" Dave said enthusiastically.
Dave and I watched with excited anticipation as Helen stood up and looked around the beach over the windcheater. There was nobody around for some distance.
"All clear."
She said, as she pulled the zip down on the side of her little denim skirt and dropped it onto the blanket. She turned to face us holding out her arms and said,
"Ta da!"
As she presented us with the wonderful sight of her little white panties with a big red cherry on the front!
"Wow, I love your panties, Helen! I like your cherry too, it's really cute, is there anything on the back?"
Asked Dave obviously keen to get an all-round view. Helen obligingly span round with her arms still out and presented Dave with a view of her sweet pantied rear. The backside of her panties were plain white but they were very tight and had slightly ridden up between her shapely buttocks, showing the edge of her cheeks. Helen had a very nice arse, almost heart-shaped and very pert. She bent over slightly sticking her behind almost in Dave's face and said,
"You like that?"
Dave's face was a picture, his eyes wide and his mouth open, I think it took a lot of restraint for him to resist the urge to just grab her arse on the spot and ravage it, but he settled on a playful spank on her backside,
"I think I'm in love with your arse!"
"Ooo!" Said Helen, and she giggled seductively, giving her backside a little shake.
Helen turned round beaming at us both and said,
"I'm going to wet my knickers!...in the sea, coming boys?"
"Too right!" Said Dave.
"Actually, I'm going to stay here for a bit, I fancy a beer, but go ahead." I said.
"Just you and me then, Dave!" Said Helen merrily, as she ran off toward the sea.
Dave turned to me and said with a broad smile on his face,
"If I don't come back, I want you to know that I died a happy man!"
He ran off chasing after Helen as we both laughed loudly.
I enjoyed sitting there just watching them together, and I needed the rest frankly, so I just opened another beer and helped myself to a sandwich. I ate and drank and watched my best friend happily larking around in the sea with my girlfriend wearing nothing but her knickers. The sea had come in quite a bit since we arrived, and they were only about 40 feet away. There seemed to be a lot of laughter and splashing about and many a squeal from Helen, and even some light-hearted grappling between them. It seemed to me that it was almost inevitable that she was going to let him fuck her, and the thought made my cock start to rise again, I just hoped that I got to watch Dave's huge cock disappearing up her pussy, I knew she would love it, and I also wondered about Dave's ambition to give her a good spanking. This was something that even I had never done, maybe a playful slap or two now and again but not what you would call a proper spanking. The thought of her prone, either on all fours in front of him, or over his knee with her panties down and her bare arse up in the air was delicious.
I didn't really feel jealous of Dave being with my girlfriend, it just turned me on to be honest. We had always been really close and in many ways, he just felt like an extension of my own self (no pun intended!). Letting other men have Helen though was something else. It seemed far riskier but that also just seemed to add to the excitement. It sort of felt more degrading to her going with men she didn't know, or even complete strangers, and added a massive feeling of humiliation at being cuckolded for me, but I found the idea compellingly erotic too.
I suddenly noticed that Helen and Dave where no longer alone in the water. There was a couple of other people too that had swum over to them in the sea and were now wading in the water really close to them and obviously talking to them. It seemed to be two men and they all appeared to be in deep conversation as Helen and Dave were just coming out of the water. They were all standing together now in about a foot of water, and I suddenly remembered that Helen was of course topless, and they would see her naked breasts close up. I could also see that she made no effort to hide herself from them, just keeping her arms by her side showing herself off, and my cock stirred again in my trunks. They seemed to take ages, and it made me a little anxious, a little jealous, that these two strangers would be enjoying looking at her near naked body. At one point they all looked over in my direction, and one of the men half put his hand up to me but I didn't react. They stood there for about 10 minutes, but it felt like forever. I was just about to go and investigate when Dave and Helen put up their hands waving goodbye to the two men and started to walk back towards me. The two men waved back but stood where they were and continued to look in Helen's direction as she walked up the beach with Dave.
"Hi!" Said Helen jauntily when they got back, blowing water off her lips.
I was just about to ask her about the men as I was extremely curious about them, when I suddenly noticed that her white panties, now obviously soaking wet were utterly transparent! Of course they were, I can't believe I hadn't thought about that! Not only that, but when I looked at her wet crotch, I was surprised to see quite clearly the outline of her pussy as her wet knickers had stuck slightly between her lips. I was quite puzzled as to why her public hair wasn't visible through her wet clothing as it should have at least hidden the outline of her pussy.
"Jesus, Helen, your knickers are completely see-through!" I said a bit shocked.
"Well, yeah, they're soaking wet." Came the obvious reply.
"Have you shaved your pussy?" I continued.
"Yes, this morning in the shower, I thought Dave...erm...I thought you might like it."
Dave looked down between her legs as he picked up his towel and rubbed himself down with a big smile on his face,
"Lovely!" Said Dave.