Amy pointed to the big 10” model, “Give her that one up her ass Jack. I want to see her ass that that monster.” Amy didn’t know that Tiffany had taken the big one and the other one at the same time. Tiffany barely moaned as the big vibrator went into her ass. Jack slid it in deep and began to fuck Tiffany who was moaning and hoping Jack would allow her to cum.
Amy was rubbing her pussy as she watched Tiffany get fucked in her ass with the big vibrator. She was beginning to feel a little jealous, she wasn’t sure she could take something that big up her ass, but she was willing to try. Jack surprised Amy when he took the smaller model and began to fuck Tiffany in her pussy.
Amy crawled around on the other side of Tiffany and grabbed her hair. She pulled Tiffany’s head up and pushed her pussy to Tiffany’s face. “I am going to cum, eat me. “
Amy came back Tiffany’s ass after Jack told her to come back and watch. Jack put Amy’s hands on the bases of the 2 vibrator and told her to fuck Tiffany. “Tiffany, you will be allowed to cum soon, do not cum until I give you permission.”
Amy was getting exited again. Hearing her brother commanding Tiffany to wait and not cum was so fucking hot. Amy was jabbing the vibrators in as far as they would go and as fast as she could work them. Tiffany was crying and begging for permission to cum, Jack winked at Amy and smirked, “I told you she will do anything and everything. Tiffany, I will count to 10, when I say 10, you may cum, you may even have a multiple orgasm. 1 2 33 4 5 6 7 8 9 10.”
Tiffany screamed and screamed as she came, Amy had never seen so much juice in her life. She touched Tiffany’s pussy and coated her finger, tasted it, hmmm not bad.
Amy and Jack fucked and teased and used Tiffany until Amy had to go home. Tiffany could barely walk, she was fucked out. Amy wasn’t much better off that Tiffany, she had been able to take the big vibrator in her ass and both of them at the same time just as Tiffany had done. Jack asked Amy when she could come back, she said tomorrow morning. She was smiling when she said that, Jack laughed with her.
Jack left Tiffany tied spread eagled on her back when Amy got there, he needed to run out for a small chore, would Amy mind babysitting Tiffany. Amy laughed, she would love to be alone with Tiffany for a few hours. Jack said he would only be gone an hour.
When Jack returned, he found Amy on top of Tiffany, they were doing a 69. Amy had untied Tiffany’s hands, the girls were eating each other’s pussy and fucking the vibrators in each other’s ass. Looking at their shiny wet faces, Jack knew Amy had given Tiffany permission to cum. As wet as their faces were, Jack knew they had both cum several times each. Amy rolled off Tiffany, they both sat up side by side.
Jack laughed to see such a sight. “I went shopping and ought you a present.” Jacked opened a bag and withdrew a strap on harness with several rubber penises of different sizes, it even had a double dong dildo, one for the ass and one the pussy.
Jack told Tiffany he was proud of her, she had pleasured them both so well he would let her chose what she wanted, she could chose who fucked her in her pussy and who fucked her in the ass, she could even chose which rubber dick went in the strap on. Tiffany was surprised; Jack had never allowed her to make choices before. She chose Jack to fuck her pussy and Amy to fuck her in the ass. She chose the next to largest rubber dick for her ass, it was almost identical to the big vibrator.
Jack lay on his back and Tiffany moved over him, reached down and guided his cock into her pussy, Amy kneeled behind Tiffany and aimed the rubbed dildo up with Tiffany’s ass. “Master, will I be allowed to cum this time? Please Master, you and Amy make me so excited, please,?”
Jack gave permission for Tiffany to cum as many times as she could. Amy pressed the rubber dick inside Tiffany’s ass. Tiffany shuddered and squirmed, She hadn’t ever felt like this before, it was better than Jack’s cock and the big vibrator. Jack didn’t move, he just tried to lie still and let Amy do all the work. Jack could feel every movement of the dildo thru the thin tissue walls that separated Tiffany’s ass and her pussy. Jack felt Tiffany’s pussy squeeze him several times as Amy plowed her ass with the dildo. Tiffany had so many orgasms she could barely ask Amy to stop.
Amy pulled out the dildo and quickly unsnapped the harness, she wanted the same fucking Tiffany had gotten. Jack went in Amy’s pussy and felt Tiffany ease the dildo into Amy’s ass. Amy came much f=faster than Tiffany had, She had to stop after only a few minutes. Jack had Tiffany remove the harness. The three of the took a shower, Tiffany was kneeling sucking and cleaning Jack’s cock, then licked Amy to another orgasm.
They went downstairs and ate a late lunch. Jack sent Tiffany upstairs to bring down the harness and the largest dildo. The girls were slightly nervosa, this was a huge dildo, they were afraid they couldn’t take it and Jack’s cock too.
Jack told Amy to lie on the couch with a cushion under her hips, he pulled her ass to the end of the couch and wedged the cushion between her ass and the couch arm. Tiffany put on the harness with the biggest dildo in place. Jack told tiffany to fuck Amy in her pussy. The girls sighed with relief, they weren’t going to take on Jack and the huge dildo.
Tiffany worked the dildo in Amy’s pussy and fucked her slowly. She was surprised when Jack moved in behind Tiffany and slid his cock up her ass. Jack put his hands around Tiffany and began to play with her nipples. He whispered in her ear it was ok if she came, she had his permission. He told Tiffany to play with Amy’s nipples as h they shared a three way fuck. Amy came first, the biggest dildo had hurt at first, but she knew she just had to take the monster in her pussy. Tiffany came when she heard Amy cum. Jack came because he was excited seeing his little sister take the big rubber dick, plus Tiffany’s ass was as milking his balls. The girls swapped positions.
Tiffany asked her Master is she would be allowed to come again when Amy fucked her. Jack laughed; Tiffany was making a damned good slave. He gave her permission to cum.
Amy’s ass was rounder and fuller than Tiffany’s ass, Jack had only fucked her a few times, but the vibrators and all the exciting fucking had her easier to get into. Jack finally came in Amy’s ass. Tiffany licked and sucked Jack’s cock and balls clean and licked his cum from Amy’s ass.
They were sitting on the floor resting, Amy had to go home soon. “Amy, what do you think of my new slave now?”
“Amy smiled at Jack and Tiffany, “I think she is a keeper Jack. You are a lucky man.” Amy dressed to go home.
Tiffany crawled across the floor to Jack and began to lick and suck his cock. “Master, it is permitted for this slave to kiss you and thank you?”