For nearly a month, he’d had them competing with each other. There were blowjob contests, they’d fuck each other in the ass with increasingly large strap-ons, and he’d time how fast they spun around to go ass to mouth. All of it was because he’d told them that the loser would be mind blanked.

His wife and her sister were both driven to win and they’d both fucked him better than they had ever before. It had worked out great.

What he hadn’t bothered to tell them, but they were about to find out, was that the winner of their competition was going to get blanked too.

After all, two mindless, obedient, enthusiastic fuck-puppets was better than one!