"Yo, what's up with your sister lately?" Tom asked, well out of earshot of Maya.
"What do you mean?" I asked cautiously.
Did he know what we were doing? Had he found out somehow? Even though we were just warming up, I felt a drop of sweat roll down my back.
"She seems different, somehow. Happier. She's smiling a lot more and the two of you haven't torn out each others' throats in a while."
"Oh," I said, relaxing. "No, I don't think so."
"I figured you would be the one to know. That reminds me, do you know if she has a boyfriend? Or a girlfriend?"
"Why?"
"I was thinking of maybe asking her out for a coffee sometime."
"I see," I said, resisting the urge to punch him in the face. "No."
"No what?"
"She doesn't have a boyfriend."
"You think she'd go for me?"
Fortunately, I didn't have to answer that question as Maya chose that time to loudly yell across the track.
"HEY, LOSER!"
That was, of course, me. I looked at her waving her arms for my attention.
"What?" I called back.
"Catch me if you can!" she shouted.
Before the words even registered in my brain, she turned around and started running. My muscles kicked in and I quickly ran after her.
We were supposed to run a five-mile course today, through actual fields instead of the rubber track. Behind the football field was a small thicket of trees and a cornfield behind that. Plenty of easy-on-your-feet dirt tracks that were well worn over the years.
At a moderate pace, it would have taken us anywhere from thirty to forty-five minutes, depending on how hard we wanted to push ourselves. Maya was sprinting at top speed.
"Hey! Slow down you two!" Coach yelled after us.
Neither of us listened. By the time I crossed the football field, my legs were already burning but I gained some distance on Maya. I was close enough to see all the muscles in her legs and, more importantly, her butt. That perfectly shaped, firm ass. Fortunately, running kept me from having an erection.
The problem was Maya was damn fast. Faster than me unless it was a particularly good day. Today had to be a particularly good day or at least I willed it to be. Even though running on grass was a lot easier, each footfall still jarred my body.
Nevertheless, I pressed on, ignoring the burning muscles in my thigh.
When we reached the entrance of the thicket, Maya risked looking around to see how close I was. Her smile reached from ear to ear and her eyes were sparkling with delight. She was sweating as much as I was.
"Hurry up, loser!" she shouted.
That was her mistake. I didn't reply, I only kept running. We were halfway through the thicket when I was close enough to touch her. Fifty more feet and I caught ahold of her wrist. Suddenly off-balance, Maya stumbled.
We careened off the path, between two big tree trunks, half stumbling, half running with little control. My foot caught on a root and suddenly I tasted dirt. Maya yelped and went down with me.
When we finally came to a halt, both of us were laughing with excitement. My foot, thigh, and elbow hurt but I had something more important on my mind. I shoved my hand underneath Maya's t-shirt and under her sports bra and squeezed her right breast. She let out a happy gasp.
With my free hand, I pushed down my shorts while she was removing her own. My sister's pussy was perfect, even covered in a sheen of sweat and dirt. I grabbed her thigh and positioned myself between her legs.
It didn't matter how many times I've done it now, it still felt amazing to enter her. She wrapped her legs around me and we fucked on the forest ground with animalistic passion. Powerful, raw sex that left both of us breathless after we came.
After my first and her second climax, I rolled off of her and we laid next to each other, recovering our breath.
"I'm still waiting," Maya said.
That's what she always said after we fucked. Ever since the day of kitchen sex and she told me she expected me to "try harder." She was waiting and the problem was, I didn't have any good ideas.
What was more extreme than fucking her in the ass in the presence of our mother? Everything else seemed to pale in comparison to that.
A group of runners passed roughly fifty feet away. I looked up but there was a tree with large roots between us and the road. Nobody could see us.
"What would you do if someone caught us?" Maya asked quietly.
"I don't know. Probably die of shame."
"You're embarrassed of me that much?" Maya pouted.
"No, that's not what I meant, I simply—"
"Relax," Maya giggled. "I know what you mean. Our lives would be done for."
"Yeah," I sighed.
"But that's what makes it so much hotter, right?"
"I don't know. I could go for a nice romantic bath with nobody around for miles."
"Boooring! If I knew how much of a prude you are I never would have let you tap this."
"Let you?" I asked, annoyed. "Remember, I was the one that fucked you on that bus."
"Ugh, that was so much hard work," Maya groaned. "It took me weeks and weeks of getting you angry enough to work up the courage. I literally had to tell you to feel me up before you even got the idea."
"Weeks?"
"Months, really."
"I had no idea."
Thinking bad on the last couple of weeks, it definitely seemed like we had been fighting more. She had been thinking about me that way the entire time. I wish I had known so she didn't have to suffer in quiet.
"That's because you're an idiot. And you're unimaginative. I'm still waiting."
"I guess I should spill the surprise, then," I said.
"Oh?" Maya asked, perking up.
"I was going to wait until you missed your next period but last week I replaced your pill with fakes."
"WHAT?" Maya shouted and instantly sat up.
With wide eyes and a slack jaw, she stared at me. I tried to keep my composure but seeing the ridiculous look on her, I couldn't help but crack a smile.
"You asshole!" she growled and slapped my shoulder.
"You should have seen the look on your face!" I laughed.
"Oh, God, I think my heart stopped for a second," Maya said, lying back down.
"Looks like I finally flapped you."
"That one doesn't count."
"Why not?"
"Because it wasn't at all filthy."
"You said you are unflappable, not you are unflappable-but-only-in-perverted-scenarios."
"It was implied, dumbass."
"Are there any limits to what I should come up with?"
"None as long as nobody finds out we're fucking."
"Really? None?"
"None at all."