After giving Thia's Ben-Wah balls several pulses she was so aroused that she couldn't stand it anymore. She led me out of the living room to the bottom of the stairway. Out of site of the living room she threw her arms around my neck and pulled her body against mine. She was grinding her tits on my chest and her pelvis on my cock and it responded immediately. Thia said, "Fuck, little brother. I'm going to explode any second. I need you in me now." She kissed me passionately and I kissed back in kind. It still felt strange kissing my sister like that. I told her to go to the first bedroom on the right at the top of the stairs and take out the 'balls'. I told her that I would let Alexis know and she could join us in a few minutes. Thia grinned and shot up the stairs. I pushed the fob button about half way up the stairway and she suddenly stopped and rocked her hips as she dropped to one knee. She turned back to me and said, "Fuck. Please hurry." I grinned at her condition. She was right on the edge of an orgasm and I wanted my cock to push her over. I pocketed the fob and left it there.
I motioned to Alexis and quietly told her what was up. She grinned and brushed a palm across her tits. I could see her hardened nipples through her dress. I held up three fingers indicating that she give me three minutes and then come up. She nodded. I hoped the sultry look on her face wouldn't be noticed by my parents. I guessed that they probably wouldn't. I had always figured that they were a little naΓ―ve like the 1950's TV parents June and Ward Cleaver but I knew they weren't stupid.
I stopped in the living room and asked if I could get anyone anything to drink. It was way too early for alcohol but my dad surprised me when he asked for a beer. Mom declined as did everyone else. I fetched a beer from the refrigerator and an iced glass and brought them back. Dad smiled and took both and poured a head-free glass of beer and took a big sip off it. I took the empty can back to the kitchen and then made my way through the dining room to the stairway.
I took the stairs two at a time to the second floor. I opened the door to the first bedroom on the right and Thia was lying naked in the middle of the bed trying to pick the 'balls' out of her pussy. She was incredibly wet. I walked over and noted Thia's frustration. I suggested that she squeeze her vaginal muscles to push the 'balls' out and she was delighted to see that it worked.
The bed in this room was particularly high off the floor and after Thia had my pants on the floor, she flipped over on her back and hung her head over the edge looking up-side down at me. She pulled my granite hard cock down to her face and rubbed it all over as she moaned. She guided it to her lips and kissed the underside of my cock at the nerve bundle and said, "Fuck my face little brother." My cock surged even harder as I bent forward and pushed my cock past her stretched lips. She reached up and fondled my balls which settled on the bridge of her nose as I pushed deeper. She gagged slightly when I was almost all the way in and I stopped there and withdrew. She dropped her head lower and pulled off my cock and sucked in a glob of saliva as she said, "Fuck my face and cum all over me. Okay?"
I smiled and presented my cock to her again. She lifted her head and I pushed my cock back in again. I knew where her gag point was and I began thrusting my hips forward and back and my cock appeared and disappeared into her face. Her cheeks bulged with each insertion and hollowed as I withdrew. Tears flowed from her eyes. She started fondling my balls again and I leaned forward and palmed her erect nipples.
The doorknob turned behind me and Alexis stepped into the room. She quietly closed the door and locked it. She came over to the bed and watched as I drove my cock deep into my sister's mouth. In this position, she could deep-throat where she normally couldn't. We could see Thia's throat expand to accommodate my fatty and then contract as I pulled back out. Alexis stripped off her dress. She had no bra or panties on. She was ready as she climbed up on the bed and dropped her lips to Thia's pussy.
Thia's eyes went wide as she involuntarily thrust up her hips. Alexis followed them up and back down again and maintained contact with Thia's pussy the whole way. Thia groaned around my cock from Alexis' attack. In less than two minutes, Thia was thrashing around trapped in Alexis' arms as a climax crashed over her. My orgasm was only seconds behind hers and I launched one cum shot into her mouth and then pulled out as she instructed and came all over her face and tits and stomach. Alexis stayed right with Thia's throbbing pussy until she settled down and went quiet.
My cock was still rock hard just as she had expected and when she could move, she pushed herself back onto her front and got in a doggy position in the middle of the bed. She motioned for Alexis to slide in under her in a sixty-nine position. Thia motioned for me to get in behind her and I moved as directed. I pushed my cock to her pussy and touched her labia. I figured that if she wanted my cock in her ass she would lower her body to indicate that. She didn't move except to push her pussy back on my cock. My balls were right in Alexis' face and she tried to suck them into her mouth whenever they were close enough.
Thia dropped her cum soaked face into Alexis' pussy and flicked her tongue on Alexis' clitoris and then dipped her speared tongue into Alexis' pussy. She ran into an obstacle and separated Alexis' labia with her fingers to see Alexis' gold 'balls'. Alexis was using her vaginal muscles to push the 'balls' out and Thia grabbed the larger one with her lips and then her teeth and pulled them both out of Alexis' pussy. Thia groaned hard with my balls on her lips as they popped free.
Thia set the 'balls' aside and went to work in Alexis' pussy and Alexis was thrashing her hips all over. Thia held on tight as I drilled her pussy with my cock. I changed up pace and depth and Thia was going absolutely nuts as she moaned continuously into Alexis' pussy. I pulled my cock out of Thia and pushed it down for Alexis to struggle her lips onto it. I fucked her face for a dozen or so strokes and pulled it out and pushed it back in Thia. I repeated this several times and was getting ready to cum again. Both Thia and Alexis' could tell I was close and Thia started slamming her pussy back on my cock as I was slamming it forward. Skin was slapping together in our fury.
Alexis convulsed into her orgasm first just as I was pushing my cock into her throat. Her muscle spasms made her throat even tighter and I could feel the difference. She groaned and tried to get her face off my cock. I withdrew and drove it back into Thia. I could feel cum boiling in my balls and then I launched a powerful, long stream of cum into my sister's pussy. She was screaming a little too loud for the circumstances as her orgasm crushed her. Her pussy clamped hard on my cock in rapid succession. I must have launched eight or ten salvos of cum into her and she groaned with every single one.
My face became a mask of contorted muscles as I spewed my load. I'm glad I couldn't see it. I had a fierce grip on Thia's Hip bones as I humped up into her. She broke the spell when she complained that I was hurting her. I immediately released her hips and after my last salvo pulled my cock out and let it drop to Alexis' face. She had recovered from her climax enough to suck my softening cock into her mouth and lash it all over with her tongue. She kept at it until she couldn't taste any hint of cum or Thia's vaginal juices.
Thia collapsed off to Alexis's side and let out a loud groan as the last of her climax washed through her. Alexis released my cock from her lips and I sat back on my heels. Alexis was grinning up at me and I bent down and kissed her. Thia watched and motioned that she wanted one too. I crawled up between Thia and Alexis and kissed Thia hard on the lips.
When we broke our embrace, Thia was looking into my eyes. There were tears in hers. She gently laid one hand on my face and feathered her fingers around behind my ear and down along my jaw line. We didn't break eye contact. Thia's chest was still heaving in her search for oxygen. Her tits went along for the ride.
Thia was quiet for a long moment and then said, "I've done a terrible thing and I hope you don't hate me for it." That got Alexis' attention and she sat up and turned around and cuddled up between me and Thia. We were listening. Thia hesitated again and then stammered out, "I told Mom and Dad about Thanksgiving. I told them everything." She burst out crying. Through her tears, she babbled out, "I'm so sorry. We were having a bonding moment after you guys left. I didn't mean to." She started sobbing. "I said the wrong thing and they dragged the rest out of me. Please don't hate me."