I tapped in the code on Grandma's gate and pushed it open. About a hundred yards up the drive I could see her house. I briefly turned to give Mom, a goodbye wave, she had dropped me off.
On the way we'd talked over we about the date.
"Third date, that's special," Mom had grinned wickedly.
"We've already eaten each other out," I replied, though Mom knew as I'd pretty much told her as soon as she'd come in after Gran had left from our second date.
"Grandma loves fucking with a strap-on," Mom had said, she would know as she'd had casual sex with Grandma for years, "Third date could be strap-on fuck night."
I hoisted my overnight bag over my shoulder and beamed happily as I began to walk to the house, the thought that tonight I might get banged by Gran made my pussy itch with excitement. The door was open as I approached with Gran standing on the top step, looking radiant in her skirt and matching black and navy top, her long hair tumbling down. She smiled as I bounded up the steps and quickly moved her face down to meet mine. I opened my lips and gave her a kiss that was certainly non-familial, though her response showed that she was appreciative of my tongue sliding forward, as her own looped round mine and her hands reached down to my ass, squeezing my buttocks through my denim shorts.
We greeted each other for at least a minute without words before breaking for air. Gran took a step back and gestured me in, "Come in then," she said.
I skipped in, with my bag over my shoulder. She glanced at it and smiled, "I see you're staying the night then."
I giggled, "I didn't think that was in doubt."
"Do you want to take it upstairs?" Gran said, "The main room this time."
I nodded and agreed. The thought that I'd be staying in the main room, Gran's room, obviously with her made me shiver in excitement. I was almost tempted to suggest we go to bed then and there, but Gran spoke before I could, "I've some wine on ice, in the back, why don't you join me there when you're ready."
It didn't take me long. I raced upstairs, put my wash-bag in the en-suite bathroom, placed my underwear for tomorrow on the chair, adding on top of it a spare pair of shorts and T-shirt (tight and cropped) and a dress Gran had bought me (in case she wanted me to dress properly for the dinner). Then I was downstairs and into the back yard.
Yard, of course, underplays it. The door led onto a patio as large as a small house, which in turn surrounded a thirty foot long swimming pool, which was bounded by a set of palm trees and shrubs, which totally hid the wall behind. Gran was just pouring out the wine as I appeared, "I hope you like it," she said and passed me a glass.
I'm not a wine buff, at eighteen I've hardly had chance to be. But I could tell expensive quality wine from cheap, bad plonk, and this was definitely one from the upper end of the market. I sat down on the lounger and allowed Gran to pour me an extra filling to make up for the amount I'd sipped. She walked over to the table and chairs, where she'd put her own glass, filling it up before taking a seat. I mentally kicked myself, whilst I was in perfect attire for sunning myself, with a short pair of denim shorts and a cropped top, Gran was dressed much more for sitting at the table. I quickly got up and joined her, trying to pretend I hadn't been so gauche as to take the wrong seat. Luckily, if Gran noticed (and I was sure she had) didn't say anything, but instead just raised her glass in a toast, "To the most beautiful teen in town."
"To the sexiest Grandma," I replied with a smile.
"So how was your week," Grandma said conversationally.
I began to tell her, as she slid her hand on top of mine and began to gently rub at the top of it. It tickled a little, making me smile, but it felt good -- sensual and erotic, an early taste of what I hoped was to come. After we talked about my life, I politely asked about her week and how business had gone -- she told me, but thankfully not in great detail, as to tell the truth once we get beyond the basics of buying and selling things, I'm kinda lost. Gran seemed to sense that as she kept it short and moved the conversation onwards. We sat there talking easily for thirty minutes as we sipped our wine. Eventually Gran looked at the swimming pool and then at me, "Do you fancy a dip?"
I'd always liked to go for a swim when I'd been visiting as a child and now as an adult I had to admit I felt the same, especially as the sun was warm and the sky was blue, making it perfect pool weather. There was only one problem, "I didn't bring any swimming gear."
"That never stopped you when you were younger, you were quiet happy to swim naked," Gran gave me a wicked smile, "I don't mind if you don't."
I vaguely remembered that, mainly cos Mom had a photo of a five year old me, wrapped in a towel after a nude swim. That was then, this was now, however, I wasn't an innocent young child swimming in front of parent and Gran who had no sexual interest in me, but a busty eighteen year old who was definitely hoping that her Gran had a sexual interest in her. "I don't mind," I giggled and stood up.
I took off my pumps first and quickly followed it with my top, looking at Gran who gave an appreciative smile, which only got wider as my bra followed it. I placed them on the lounger, my tits dangling beneath me as I bent over, before sitting down so I could remove my socks. Gran kept a focus on my big boobs as they swayed in front of me like two rocking balls. I stood up again, abruptly, making them jiggle and bounce and she gulped back the rest of her wine with an unladylike slurp. I began to undo my shorts, much slower than I normally would, making sure Gran looked forward to what was to come. Off they came and I flicked them up and caught them quiet dramatically and leaving myself just in my thong. I slid my thumbs under the elastic, almost taking them off, but not quiet, dancing and swaying for a few moments, pretending I was a stripper for Gran's delight. I turned and bent over so she could see how the thin material slipped between my rounded buttocks and slowly pulled them down to my ankles, before turning with them in my hand and smiling at Gran. I delicately dropped them on the lounger beside me.
"I think you might need a towel," Gran said, "Why don't you get in the pool and I'll go get you one."
"Okay Gran," I giggled and sashayed over to the pool. It was shallow at the near edge and I walked down the steps into the water, pausing when I got to the level bottom. I turned and smiled at her, as she still hadn't gone but was watching me, "You won't be long, getting me that towel, I wouldn't want to get lonely without you."
"Not long," she said with evident desire, her eyes scanning my naked body and imprinting it in her memory. I stayed still long enough to make sure she got enough of a view not to forget it, before turning and leisurely swimming to the other end. By the time I got there she had gone. I swam back and then switched to back stroke, before doing a few short lengths of breast. It seemed Gran was taking a long time to find a towel, I wondered without particularly thinking about it, and did a quick underwater somersault before switching to back again. The sun was warm and the day perfect and about to become more so.
"I thought it looked so nice, I'd join you," came Grandma's voice. I righted myself and stood up, the water reaching to the top of my thighs, and gave a growl of appreciation.
Grandma had taken the time to change into a two piece bikini -- whilst it wasn't naughtiest I'd seen, as it certainly covered her small bosoms and the bottoms were half-way between shorts and panties, but it certainly looked good on her (or she looked good in it, I suppose). She laid the towels on the sun-lounger next to my clothes and slowly entered the pool. I kept my eyes on her, admiring her sexy older body and making sure my own titties swayed so she could equally admire my young one. She took another forward step and then leant forward, starting to swim.
Despite her age she remained athletic, powering forward powerfully to the end of the pool swifter than I could manage. She swam back more gracefully and stood up, her almost naked wet body inches from mine. Her hand reached up to stroke my chin and gently guide my face towards her. Our mouths opened in unison and her tongue slithered forward, running and massaging mine. I crept even closer, my nude body pushing against her. My large tits were only separated from her pert ones by a thin strip of material and I could feel the press of her hard nipples. Her hands moved to my naked buttocks, fondling my round rear and kneading the flesh with her thin supple fingers. I kissed her harder, the warm sun beating down on my body, the water lapping around my legs.
I reached down, slipping my hand under the elastic of her bikini bottoms. My finger curled round and I found the smooth, shaven slit and slowly started to stroke it. Gran grinned for a moment and then resumed our kiss, her tongue exploring my mouth and pressing at mine. I shivered excitedly and ran my finger up and down the slit, not quiet entering, but not quiet not either. Her hands were squeezing my butt so hard I'm sure she left paw prints on it, not that I was complaining. "Mmmmnn," she groaned as we broke the kiss for a moment, "So beautiful."