His willpower is almost washed away

I was starting to lose control. While Akane sweetly nibbled at my ear, my hand crept further up her sumptuous inner thigh. Soon, my fingers were exploring the outsides of her honey pot.

My mind was in turmoil. On one side was the lust building up inside me as I manipulated the clit of the hottest girl in the local high school. On the other hand, my mother's admonishment to keep my new found libido a secret plagued my conscience. The former turned out to be a much firmer primal voice rationalizing that whatever happened could be blamed on the ****.

"Oh little brother use your fingers to make your onee-san feel good," Akane implored as she spread her legs to the maximum width that the tub would allow. She let out a guttural moan as the tip of my index finger slid just inside her pussy.

"Naughty boy making big sis cum like that," Akane teased with mischievous glee. Then she added with a sultry throaty voice. "Now, do it again, but this time longer and harder."

I slid my finger all the way knuckle into her warm wet inviting vagina. Her inner walls gripped my digit and pulled me further inside her. I turned onto my side, sloshing water out of the bath onto the bathroom floor. Passionately I kissed Akane our tongues coiling around each other. My free hand went to her chest and began to massage her ample breasts. Akane moaned into my mouth. My hard cock slipped from between my pressed together legs and fell on her silky thigh. Akane paused for just a second as the new sensation registered. Quickly I slid a second finger inside her to distract her from the fact that the only hard dick in the world currently rested just inches from her virgin pussy.

"Oh little brother, your fingers are so good," Akane cooed as our mouths parted for just a second.

I debated if I should remove my fingers and replace them with my cock. Akane was definitely willing. I doubted I would last long after penetrating her. I could feel my orgasm building up inside myself. While I debated, this lewd dilemma circumstances conspired to solve it for me. Akane's hips shoved into my hand, pushing my finger deep into her as she moaned into my mouth. The young 18 collapsed back into the water and went silent.

I spun around and shook Akane. "Onee-san, Onee-san!"

My panic soon subsided as she let out a loud snore.

"Can't hold your liquor?" I asked the **** fox disappointment evident in my voice.

I extricated myself from the buxom beauty. Water dripped from my slender young body as I looked lustily over Akane's luscious form. As I stood by the edge of the tub, my cock stood rock hard bobbed up and down just inches from Akane's face. My thoughts drifted to my mother's tongue, licking the tip, and I wondered how it would feel to have this 18 year old's mouth wrapped around my shaft.

I watched as Akane snoozed in the tub. "She licks her lips in her sleep." I was amazed at how erotic she looked with her breasts just above and vagina just below the waterline.

I sighed. I reached under Akane's arms and lifted her out of the tub. "Probably for the best that you fell asleep. I doubt I could have stopped myself from going further."

I lifted the naked goddess onto my back and piggybacked her to her bed. By the time we reached the bedroom, my legs were rubbery from exhaustion. The last few steps were agonizing. Before I could completely cross the room, my quadriceps gave out, and I began to fall. Fortunately, the bed was not too far, and Akane, and I both crashed unceremoniously on the mattress.

Akane now landed on top of me. My hard cock pressed between her stomach and mine. "Your leg ish pokin me in da belly." She slurred in a semiconscious state before shifting to relieve the pressure. The tip of my penis grazed the full length of her wet pussy. Pre-cum spurted out as it took all my will power not to orgasm.

"Too close," I moaned as I gently pushed her off me. I started to roll over and get out of bed when a spasm more potent than any before tore through my chest. Sweat poured from my brow. My muscles went rigid as my vision turned black and shrank away from me. The last thing I remembered was a soft hand draping over my chest as the world faded away.

I awoke with Akane hugging me tight to her. My cock, which had been rigid steel when I had passed out, was now a limp noodle. My strength was gone, as well. I was no more than a child in his big sister's arm.

"Good morning, little brother," Akane said, kissing my forehead. "I guess we both had a bit too much to drink last night."

Akane slid out of bed and stretched her lithe nude body. "It felt terrific to wake up next to you with nothing between us. A girl could get used to that."

I watched Akane's nude ass sway as she walked out of the room and down the hall. Is she not even going to bother to get dressed; I thought as I rolled out of bed. My cock had returned to its lifeless state, and I generally felt like I had been run over by a semi-truck.

With great effort, I slowly made my way back to my room to get dressed. I decided that I could not wait on the test that my mother had taken to come back before I started to investigate what was wrong with me. I still had my clearance for all the genetic research at the university. I needed to make my way to the library as soon as possible and begin my analysis of what went wrong.

"The Library," I said dreamily, thinking of the beautiful red-haired chief librarian Lara.