Jack and Sally hadn't spoken a word since they left the school earlier. Both were busy with their own emotions, busy sorting out their own thoughts and feelings.
In the car, half way home, Sally spoke first: "Wow, Jack, this is crazy. Do you realize we just broke about every single school rule? I can't believe we did it in Mr. Matthews' room."
"I forgot it was his room, Sally," Jack answered. "Did it turn you on to know we were doing it in the Sex Ed room?"
"I couldn't believe it when you dragged me there and snuck us in. I thought you knew. I thought you had it all planned. We could have gotten caught in there. It was so hot, Jack. I nearly came when you pushed me against the wall and I felt your hard cock pressing against me."
"I was horny all the time just thinking about you being naked under your clothes. I couldn't believe it when I felt your bare ass under your skirt earlier. And when you blew me backstage, I nearly lost it, I was so turned on."
"You came a lot, Jack. I had to swallow fast, you know. I didn't want any of it to drip on the floor."
Sally paused.
"You know what I liked most tonight, Jack? It was seeing you next to the kids in my class at the party. You look so much older than them. A real college boy I am so proud of you, Jack. I love you so much."
Jack didn't answer her straight away. After a short pause he said quietly, "I love you, too, Sally, more than anyone in this world. I loved your performance tonight. It was perfect. You looked absolutely stunning at the party in your short skirt and cut-off top, better than any of the other girls. I am so proud to have you as my ..,"Jack hesitated before he continued, much less confidently, "... girlfriend?"
"Oh, Jack!" Sally giggled excitedly. "I'm your girlfriend and you are my boyfriend! I've never been happier in my life! I don't want us to split, ever, my big brother-boyfriend. I love you so much."
"Let's not go home, yet, Sally. I don't think I can face mom right now. I know a quiet spot nearby where we can park up. What do you think, babe?"
"We've plenty of time before we have to be back home, Jack. It's not even ten."
Jack turned the car around and made his way to a lonely spot he had discovered last year while he was working on a local farm.
--
Once Jack had parked the car, they took off their seatbelts and Sally lay down on the front bench again, her head in his lap. Her short skirt was still wet. She opened the top button and slid it off her hips. She was fully naked. She didn't care. Anything was better than the soggy feeling of this wet skirt against her ass.
The siblings started to feel the chill of the evening, and Jack ran the engine for a while to get the heater going. He let his hand drop on her chest and started playing with her tits. He loved how they felt, soft and firm at the same time and he loved to squeeze her nipples. Sally remover her top to give him better access.
"Big brother-boyfriend. Sounds good." Sally said quietly, more to herself.
"Little sister-girlfriend," Jack responded, equally quietly.
Jack slowly moved his hand to her pussy and started playing idly with her newly shaven girlish-looking slit.
"Wow, Sally, I couldn't believe my eyes when I saw your bare pussy in Mr. Matthew's room. It turned me on so much, seeing you all naked like this," Jack said, slowly stroking her.
"It turned me on shaving it for you, Jack," Sally replied. "I wanted my bush gone for a while now and brought my razor to school this morning. It felt really hot running it across my pussy in the girls' showers at school. I felt extremely naughty. I nearly got caught by Marilee and Jessica, though."
She paused briefly to enjoy the play of his fingers on her naked cunt and the butterflies that this created in her stomach.
"Oh, yes, Jack. Keep doing what you're doing babe, it feels great. Oh, yes stroke my little clitty, please. It's getting hard again already and my pussy is getting wet. Oooh, I like how this feels, babe."
What had started with one finger sliding up and down her slit soon grew into a two-finger operation: his index finger to the left and his middle finger to the right of her most sensitive organ. He applied a little bit of pressure and watched her tiny clit peak out from under its hood each time he bent his fingers. Every time, her clit showed its little head, Sally's hips bucked slightly.
Jack's cock was rock hard and longed to be freed from his confines. He wiggled his hips slightly, trying to get more comfortable. Sally lifted her head and said in her little girl voice: "Is your cock hurting, Jack? I can feel how hard it is. Do you need your little sister-girlfriend to kiss it to make it better?"
Jack was extremely turned on hearing his sister talk in her girly voice. He whispered into her ear, "Yes, sis, my cock is so hard it hurts. Kiss it to make it feel better, please."
Sally turned onto her stomach. Jack opened his jeans and pulled his hard dick out. When Sally was facing him again, his hard rod was right in front of her face. It still smelled of her pussy. Sally started to plant little kisses all around his purple tip.
"I'm kissing it, Jack. See! Are your little sister-girlfriend's kisses helping you, Jack? Is your big hard cock feeling any better?"
"It's a little bit better already, Sally. Maybe if you licked it, it would help more?"
Sally stuck out her tongue and gave his hard and throbbing cock a few long licks. Every single lick ended with the tried and tested swirl of her rough tongue around his tip. She held the base of his cock in a firm grip, making it swell even more. She felt his blood pulsing through his hard member as she licked it. Feeling his pulse in her hand excited her.
--
Running her tongue along Jack's swollen member made Sally's pussy itch with excitement.