Serena's trigger

“You there, cow?”

“Answer me, slut.”

Then just now he had sent a couple of panic messages. One of them was just the words “SERENA SERENE SLUMBER” in all caps.

The last message read: “I hope this works on text or Vince would kill me.”

Mason stared at the words. Were these words somehow responsible for what had happened to his sister? The cow thing had happened after two claps and a command. Maybe these trigger phrases worked the same way. “Serena Serene Slumber.” It sounded like some kind of command phrase. His hands were still shaking as he read it again.

He had to test it. There was no other choice.

Mason stood up and walked back to the bathroom, heart hammering in his chest. Serena was still where he had left her on the wet tile floor. Water pooled around her hands and knees. She had lowered her head and was licking the water pooling on the floor beneath her, tongue lapping at the small puddle like an animal. Her black hair was soaked and spread out, some strands floating in the water. Her heavy breasts rested partially in the puddle, nipples hard from the cool air now that the shower was off.

Feeling ****, Mason took a deep breath and loudly yelled out the words.

“SERENA SERENE SLUMBER!”

The moment his sister heard the words her head popped up. She stayed still for a few seconds, water still dripping from her wet black hair. Then she stood up on her feet in one smooth motion. Mason was mesmerized by the view of her perfect ass as she rose. The round, firm cheeks flexed slightly, still glistening with water from the shower. Drops ran down the curve of her ass and along her thick thighs. He couldn’t help staring for a second, his eyes tracing the way her hourglass body looked from behind, wide hips, tiny waist and those heavy breasts he could see the sides of even from this angle.

But he couldn’t be caught checking his own sister out. Mason quickly looked away and expectantly called out her name, hoping she’d respond like his normal big sister again.

“Serena?”

To this, Serena turned around. Mason expected an expression of shock and horror. He had hoped those words had finally broken the spell. But when he saw Serena’s face it was completely devoid of emotion. No surprise, no embarrassment, no recognition of the fact that she was standing naked in front of her little brother with water still running down her massive tits and between her legs. She bowed slightly, closing her eyes for a moment before opening them again. Her light brown eyes looked calm and empty at the same time.

“**** Serena is ready to serve you master,” she said in a calm, flat tone. Then her voice suddenly got louder and more intense as she yelled out the final two statements like a proud proclamation. “ALL HAIL ALPHA 7! I BELONG TO ALPHA 7!”

Mason stared at her, his soaked clothes sticking to his skin. “Serena? What’s happening.”

He stumbled as he asked the question, still trying to process the complete change in her.

“You triggered me master,” Serena replied without any hesitation. “As per my training I must serve you until I am decommissioned using the appropriate phrase.”

“Decommissioned? Training? Just what the hell is happening here,” Mason spoke with some anger creeping into his voice. His hands were still trembling from dragging her by the hair earlier.

“I am sexslave Serena,” she answered simply. “I am the property of the Alpha 7 frat house in Washington DC. My training demands that I serve any man who uses my trigger phrase as an obedient sexslave since only frat members know the phrases.”

Mason had started to put the pieces together now. This seemed to be some form of brainwashing. It made him a bit relieved since he was glad his sister had not lost her mind or was secretly some kind of pervert. But he was equally horrified that someone had managed to brainwash her so completely. These guys had turned his strong, responsible big sister into something that called herself a sexslave and yelled allegiance to some frat like it was a religion.

“Do you not recognize me?” Mason asked her, his voice quieter now.