It was time for Linda's swimming lesson again and they decided she would go, but not stay for the free swim after. She left with her dad and her mom, aunt, and uncle were sitting in the back yard talking. Tess was bored, so went in to find Jeff. Jeff was in the bedroom playing a computer game when Tess walked in. “Whatcha doing?” she asked.

“Um... I'm studying,” he replied as he shut down his computer before Tess saw what he was really doing. “What are you doing?”

“Nothing... Everyone is outside talking. Um... do you think... um... could you maybe give me my treatment before Linda gets home? I'd kinda like just you do do it without her,” Tess stated shyly.

Jeff was a bit shocked by her request, but tried to hide his surprise. “Why do you want just me?” he questioned, being amazed she asked such a thing.

“She's mean... You're nicer. You usually do everything anyway. She just... um... (whispering) bitches at me,” Tess blushed. “I already got the thermometer if you have to take my temperature. I'd rather you didn't though...”

Jeff was going to give in to her, but didn't think he would look very “professional” doing so. “Well, I know you don't like it, but we need to make sure everything is OK, don't we?”

“OK,” Tess sighed. “Can I just pull my pants down, not take them all the way off?”

“OK, we can do that I guess,” agreed Jeff.

Tess smiled slightly with satisfaction as she crawled on the bed and lay down on her belly. She pushed her shorts down to her knees, exposing her ass and then settled, waiting on Jeff.

Jeff stared and the girl's naked ass not believing his luck. His cock instantly became hard. With one hand he adjusted it to a more comfortable position and with the other he began gently rubbing her bare ass.

“That tickles,” Tess smiled, but made no effort to stop him, but rather stayed quiet letting him rub. It was far better than getting her temperature taken. His rubbing was relaxing, but there was something more than that. Strangely she felt comfortable. Her pants were down, but all that was exposed was her ass which he was rubbing. She turned her head towards him so she could look at him.

“It's not so bad,” commented Jeff.

“Have you ever had your temperature taken this way?” Tess asked. Jeff nodded. “You didn't mind it?” Jeff shook his head. Tess pondered for a moment before mumbling, “Well, I still don't like it.” It did make her feel better that Jeff had it done that way too though. She cringed as she felt the thermometer slip into her. Naturally she could feel it, but it certainly didn't hurt she thought. Maybe she was just making a big deal out of nothing. Jeff's hand did sort of feel nice resting on her ass and she liked when he was rubbing her. It was still embarrassing though. At least he only opened her a little with his fingers and then released her, not like Linda who had pulled her apart like she was trying to split her in two and then held her open like that the whole time. It was nice of Jeff to put his hand on her ass sort of covering her too

Jeff continued to rub Tess's ass with the fingertips of his free hand. Tess could feel her body start to tingle. She didn't like the idea of the thermometer in her ass, but his touch was doing strange things to her. After a minute or two Jeff started to pull out the thermometer. “I don't think it's ready yet,” Tess whispered like it was a secret. At the same time her ass rose up trying to keep contact with the thermometer. She shivered as Jeff pushed the instrument back into her ass. Once again he began to rub gently. Unknowingly she inched her knees up, raising her ass even more.

The tingling continued to escalate. Tess's eyes closed as she focused on the sensations. She no longer resented the thermometer as it sort of faded into the pleasure. “I have to check something,” Jeff said, but his voice seemed distant to Tess. She sighed as the thermometer was pulled out, but Jeff's finger began to rub directly on her rosebud. It surprised Tess that it felt sooo good to her. She didn't realize she was doing it, but she began to push back against his finger.

Jeff felt Tess pushing back. Her knees were almost pulled up to her chest and her shorts and panties had worked down to her ankles. Not only was his cock straining against his pants, he was fascinated by what she was doing. He had heard girls liked their asses played with and some liked to be penetrated. With his hormones raging, he decided to try. Slowly he began to increase the pressure of his finger on her rear opening while continuing to move it around in a small circle.

Tess's body was on fire. She had no idea her body would react by being touched “there”! Her mind told her to pull away, but her body was pushing back. She couldn't stop, even though she could feel the finger pushing as well. Tess gasped as the finger broke through and entered her. It hurt, but felt good at the same time. Her body tensed as she tried to decide if she should pull away from it or let it stay. Waves of new, strange, and wonderful sensations flowed through her body masking the hurt.

Jeff felt Tess's body tense as his finger finally popped into her ass. Her hole squeezed and then relaxed as it spasmed. Her reactions began to scare him and he was about to pull his finger out when he felt her push back. “I have to check deeper,” he muttered as he pushed in.

Tess felt the finger slowly sink deeper into her. The “tingles” she was experiencing increased, dulled only by the slight pain she felt. She knew she shouldn't be allowing this, but the sensations being produced were more than her urge to stop. Her eyes closed tightly, as if to shut out the world, as Jeff's knuckles pushed against her ass driving his finger deeper into her.

Jeff's finger began to move. Tess's eyes widened as sensations like she had never felt began racing through her body. Instinctively she pushed against the finger intruding her ass. The pain was receding and being replaced by wonderful feelings. Her eyes closed again as her mind focused on those feelings.

Tess began to rock in time with the finger pistoning in and out of her rear hole. Her world was now centered there and she was no longer aware that Jeff's finger was in her ass nor did it matter he could see everything. She had already experienced some sensations when Linda and Jeff had rubbed her pussy and she had started rubbing herself, which felt a little better because there wasn't the embarrassment. This was different though. Something bigger was building and it excited her, but also scared her some because it was a new feeling.

Suddenly something happened. Her body seemed to explode with pleasure. She pushed her ass back against the finger hard, trying to get more of it inside her. The fist made by Jeff's remaining fingers continually punched her ass. Tess gasped trying to get more air into her lungs. Her pussy seemed to be quivering, giving her even more pleasure.

“No more!” she gasped. As the finger pulled out of her, her knees slid down and she collapsed flat onto her belly. After what seemed like forever her body seemed to calm some and her eyes opened. She turned her head and looked at Jeff. He was staring at her ass. Tess became aware of her nakedness and, with some effort, rolled onto her back and her hand went down to cover her pussy. Her ass felt strange and, much to her surprise, also felt “empty”, but she wasn't ready for a finger in it again.

At first she just blushed, but Jeff didn't notice because of her already flushed face. Tess looked at his crotch and could see an obvious bulge. She knew what was there, but it hadn't seemed that noticeable to her before. It perked her curiosity. “You've seen me lots... can I see your boy thing?” she asked softly.

Tess pondered for a moment. He had seen her before, but actually showing him was different. She did want to see him though, so she rationalized it was only fair. Slowly she pulled her hand from her crotch. Jeff started to undo his belt. “Open your legs,” he told her as his jeans dropped. Tess stared at his underpants and the now very obvious treasure they held. Her face flushed as her knees bent and her legs parted, giving full view of her.

Jeff hooked his thumbs on the waistband of his underpants and he pushed them down. What seemed as a huge cock to Tess bounced as the underwear dropped. It finally stopped waving and stood straight out from his body, pointing toward the ceiling. “Wow!” Tess muttered. She knew what boys had, but actually seeing one was shocking. She hadn't expected a stiff cock, all veiny, standing straight up, with a large, at least to her, sack hanging down below it. How could she not have noticed something that big before? It made her wonder if all boys were like that or if Jeff was exceptional.

For a while Tess just stared until Jeff muttered, “You can touch if you want.” Tess hesitated for a moment then tentatively reached out. Her fingertips made contact with his cock. She looked up at him to see if there was any reaction. Seeing none, Tess focused on Jeff's crotch once again. She ran her fingers through the patch of hair above his dick. It surprised her how much he had considering she had none and her sister was also almost bald even though she had started to grow some. It also surprised her how coarse it was. She had expected it to be curly, but soft, like one might have on their head. This hair was course and stiff.

Tess nervously moved her fingers down. She jumped when Jeff's cock twitched, but continued exploring. She slowly traced the shape of his cock and balls with her fingertips. His cock was hard, soft, and warm. His sack was nothing like what she had expected. Its shape changed, moving around her fingers as she moved. Getting braver, Tess began to use her whole hand to explore.

Jeff's cock strained even though free. He could tell his orgasm was building and Tess's touches only served to make his climax more urgent. Jeff contemplated telling her to stop, but the sensations were too strong and too pleasurable to even think such a thing. Suddenly he erupted, spewing cum all over Tess. He was shooting in the air, but what goes up must come down and Tess was where it was coming down. Most landed on her chest and belly. “Sorry,” me muttered in embarrassment. “I didn't mean to do that.”

Tess's eyes opened wide as Jeff's cum shot into the air. “Did you cum?” she asked. Jeff nodded. “Did I make you cum?” Jeff nodded again. Tess smiled; proud of her accomplishment. She looked down at the cum and then back to its source. “It's shrinking!” she blurted as she watched his cock begin to droop as it softened.

Jeff suddenly became embarrassed and pulled up his pants. “I should get going before someone comes,” he muttered as he turned and walked out the door leaving a cum covered, near naked Tess alone.