Jack and Abby play with Ava

Jack woke up the next morning to find Abby already awake. He grabbed the collar and went downstairs. Ava was sat having coffee while Abby was nowhere to be found. Jack walked over and sat down next to her, holding the collar out.

"Put this on," he told her.

"The collar you were wearing yesterday? Why?"

"Just do it and I'll explain after," Jack continued. He knew he wouldn't need to trick Ava into wearing the collar.

"Why?" She asked, looking at it suspiciously. Jack just pulled a face at her and she sighed as she took the collar. She lifted it to her neck, causing Jack to grin widely as he heard the clasp snap shut.

"Anything else Master?" Ava asked. Jack grinned, he'd woken up with a strong desire to collar Ava and now he'd done it, it felt extremely satisfying.

"From now on, even when you're not wearing the collar, you'll stay under my control as if you were wearing it, but you won't remember me telling you this. All you'll feel is a strong desire to do whatever I tell you and doing what I say will excite you," Jack ordered, the second part of Abby's command kicking in.

"Yes Master."

"Now on your knees and suck my dick," Jack told her. He'd had a fantasy of Ava sucking his dick for a while, one of the guilty pleasures his imagination conjured up from time to time when he masturbated. The idea of fulfilling that fantasy was too exciting for him to ignore.

He watched as Ava kneeled down in front of him and unzipped his pants. He lifted his hips so she could shuffle them down far enough to free his cock. He was already getting hard, but as she grabbed him and kissed its tip, it quickly grew to full size. She took the head in her mouth, her lips running over the sensitive head as her tongue lashed the underside repeatedly. Jack groaned and leaned back in his chair, closing his eyes and enjoying the sensation.

He opened them a few moments later when he heard a noise in the doorway. He looked up to see Abby, her hair still wet from the shower, grinning at him. She leaned against the frame and watched as Ava sucked her step brother's cock. The sight of her head bobbing up and down on his thick shaft excited her. Jack watched as Abby worked a hand into her panties and began to stroke herself.

"Enjoying the show?" He asked. Ava didn't even slow down to look at who he was talking to.

"Oh yes," Abby gasped.

"Ava, go and help Abby, show her how good your tongue can make her feel," Jack ordered. Abby looked surprised, she hadn't been expecting that. She'd just wanted to watch, but instead she was watching Ava crawling across the floor to her. Jack watched her ass swaying from side to side as she made her way to Abby. Abby just stood there, unsure how to react as Ava pulled down her pants and underwear.

Abby's confusion was short lived as she felt Ava's tongue lick up between her already wet folds. She groaned, Jack wasn't the only one that had fantasized about Ava's going down on them and it felt just as good as Abby had imagined. Especially when Ava started licking and kissing Abby's clit, Abby couldn't help but moan. She looked at Jack who was watching intensely. He stood up and made his way over to the pair.

Kneeling behind Ava, he grabbed her short and pulled them down. They were red, with flowers on them and extremely baggy. Very comfortable for her to sleep in, but did nothing to show off the amazing ass Jack had wanted to see naked for a long time. He pulled them down, revealing her firm toned ass and tight pink pussy. She was clean shaved and Jack ran a finger along her smooth lips. She was already wet, it seemed she was enjoying herself. Jack wondered if it was sucking his cock or licking Abby's cunt that had turned her on. Maybe it was both.

He didn't think about it too long before he lined himself up with her wet slit and buried himself inside her. She gasped as he spread her open, his cock spreading her pink labia and delving into the silky depths behind them.

"Help me step-bro," Abby laughed before suddenly moaning as Ava sucked on her clit.

Jack couldn't believe he was fucking Ava. If someone had asked him a week ago to list some things that would never happen, this would have been very close to the top of the list. He couldn't believe how tight and warm her pussy was. It squeezed his dick with every movement. Ava seemed to be enjoying it too from how ragged her breathing and the small gasps she let out while she tried to focus on pleasing Abby.

He ran his hands over her tight ass, feeling the firm flesh under his hands. He leaned forward and grabbed her perky breasts, massaging them and tweaking her nipples. He roamed his hands over her body, enjoying being able to touch her as freely and as much as he wanted. The knowledge she was under his control and he could have her how he pleased turned him on a lot. He felt his balls tightening as his orgasm approached.

"Ava, as soon as you feel me cumming, you will too," he told her. She didn't react, just continued licking Abby who sounded like she was close to her own orgasm. Jack slapped Ava's ass hard as he picked up his pace, fucking her hard and fast, each thrust pushing her face into Abby's wet cunt. A few thrusts later he grunted as his buried himself to the hilt. His cock twitched inside Ava as it began to fill her tunnel with his seed.

The feeling triggered Ava's orgasm and she moaned loudly, gripping Abby's thighs tightly as her twat squeezed down on Jack's cock. She gasped and panted as her body shook and her toes curled in pleasure. Abby looked down, half turned on by the sight before her and half disappointed Ava had stopped when she'd be so close to her own orgasm.

"Ava, make sure Abby cums, twice," Jack ordered as his orgasm subsided and he noticed Abby standing there unsatisfied. Abby grinned as Ava simply agreed before diving back between Abby's legs. Jack pulled out of Ava and stood up, making himself a coffee as Abby moaned loudly through her first orgasm. She sank down the doorframe, gripping Ava's hair tightly as the older blonde continue to lick and suck between her legs.

Jack found himself highly aroused by the situation, but after cumming so recently and not being under the influence of any commands, he needed a break. Not to mention the crazy sex he'd had with Abby the night before. He sat down and simply enjoyed the show. The finale was loud and Abby ended up on her side, Ava's head pinned between her thighs as she rode her second orgasm.

"Holy shit, where did you learn to eat pussy like that?" Abby asked after she had finally recovered.

"College," Ava replied simply, turning to face Jack and staying on her knees. He realised she was waiting for more commands or to simply serve him however he needed. Jack looked at her, wondering what he should do with her next.