On an unusually mild evening for this part of Texas, my sister Sarah and I sat on her driveway, drinking beer and just talking. Because of the mild weather, Sarah wore a very light and loose fitting long sun dress. Sarah never wears dresses, so this took me by surprise. It was clear that she wore no bra underneath, because she kept having to adjust the top of the dress to keep her tits from spilling out. It was just dusk, so she feigned not wanting to get caught that way outside. I wore a pair of white basketball shorts, with nothing underneath, and a t-shirt.
Sarah has been acting restless for some time, continually moving around, and just being anxious. I let it go as her just enjoying the weather. We chatted about our respective exes, work, and basic boring shit, while sipping the beers. Eventually, our talk gradually became flirtatious, then to sexual, and finally to fantasy.
"If you could do anything to me, what would you do?" Sarah asked.
"I would do anything you would let me do."
"Ok, so let me rephrase that. What you do to my body that you haven't done already?" she asked with a mischievous grin.
"That's a tough question, Sarah. I don't want you to think I'm sick or something."
"J, there isn't much I won't let you do to me. Now come on! If you could do anything to me right here and now, what would it be?"
"Anything, here and now? Hmmm... Ok, here goes. I would fuck your ass."
"Right here out in the open?"
"Yep!"
She pondered that for a bit, then turned and lay her head in my lap. I stroked her hair as she stared past me into the sky at the barely visible stars. The conversation had already given me a substantial erection, but she paid it no mind, and let it rest against her cheek.
"What are you thinking about?" I asked her as my other hand crept towards the top of her dress. I caressed her hair, while gradually pushing the top of her dress down. She made no move to stop me, so I continued.
"Nothing."
"No way! I just told you I would fuck your ass. You have to tell me now!"
I kept pushing her dress lower on her breasts, her nipples just barely coming into view. The streetlights had come on, and made her beauty flow in the fading daylight.
"Fine. I'm thinking about what I want to do to you. Happy now?"
"Well no. What is that you want to do?"
"Go inside and get more beer," she said as she jumped up. When she did, one of her tits became fully exposed, as her dress gave way with her movement.
"Sarah!" I laughed. Her predicament made me chuckle. Leaving her breast out, she picked up the empties, and started towards the house.
"What about the neighbors?" I asked as I watched her ass sway.
"So what? It's just my boobs."
"Then show me," I challenged.
Sarah turned to face me, breast exposed, hands full of empty beer bottles. She lifted her bare foot under the length of her dress, grabbed the fabric between her toes, and pulled down. The top of her dress gave way, and slipped all the way down to her narrow waist. It caught on her hips, and stayed there. Satisfied, she went on to get the beer.
When she returned, her dress was the same way. I took a quick glance around to make sure no one was out and about, but Sarah proudly strode back to me, her breasts lightly bouncing in the evening air with every step. She had brought a towel with her, and spread it out on the ground before sitting next to me again. Seeing her tits out like that had me at full wood now. I popped open our beers, and handed one to her. As she took a long pull, I asked her my question again.
"So...what is it that you want to do to me?"
My sister set her beer down beside the outspread towel, and began moving to lie down. She still said nothing, and I just watched her nakedness as she finally lay face down on the towel. She raised up on her elbows, letting her breasts hang free, her nipples just grazing the towel, and said,
"This." With that, she reached for the elastic waistband of my shorts, pulled my rock hard dick out, and immediately put it in her mouth. I just leaned back, and watched her beautiful lips wrapped around my cock. She applied gentle suction, and used her tongue to work magic on my member. Deeper and deeper she went, but could never get all of me in her mouth. Regardless, it was the most amazing blowjob I've ever received. Here we are. Outside in the open, my half naked sister sucking my fat cock. She sucked me like a baby on a pacifier.
"Oh god, Sarah. Suck me. Oh yes, use your tongue."
"Mmph."
Then she started humming a tune. I don't for the life of me remember the song. But the vibrations drove me wild.
"Sarah... Oh my God, Sarah."
