She tries, but her sister isn't buying it

"Are you kidding me? You're telling me that your pager MADE you climb out of the window, piss and shit in the yard, and then come back inside and wait at the door like a puppy?" Megan asked, incredulously.

"Well, yeah. Its got some kind of mind control thing in it, I don't know how to explain it, but its making me act like some kind of pet I think." Elizabeth's voice sounded tiny and unconvincing, even to her own ears.

"Really? Before we even got this pager, you were running around the house, joking around making barking noises and begging for treats from me. You can't blame it for that."

Elizabeth considered that. "But, I still had the phone with me, it was doing this buzzing thing."

"A buzzing thing? So you weren't obeying my commands because you liked to?" Megan asked. She'd been enjoying this more and more, and if the phone or pager or whatever was helping it along, so what? "Prove it. Here, I'll remove the collar and we'll see if its really just you."

She pulled out her own phone and tapped the screen, and a click came from the pager on Elizabeth's collar. She reached up and pulled it off easily.

"Oh thank god. I can finally be mysel-"

"Come here." Megan interrupted her and patted her thigh as she issued the command. Elizabeth's mind blanked, she dropped down on all fours, and crawled over to her sister's feet, looking up at her to wait for another command.

Megan smirked. "Good girl, good girl Ellie." She reached down and petted her older sister's head. Elizabeth felt the familiar wetness between her legs and warm fuzzy thoughts in her head. "Yeah, really under the control of that pager, uh huh. I think, actually, that you get off on this for some reason."

"What?! No way, I, I... I don't know what's going on, it must have trained me..." Elizabeth trailed off. Had it though? Or had she been secretly pushing it, encouraging things along? She couldn't remember, it was too fuzzy. She needed time.

"Oh really? I've got an idea, let's check. Ellie, sit up girl. Beg." The command elicited an instinctual response from Elizabeth. She sat up and assumed her now familiar begging posture, legs splayed open. She had forgotten her panties outside earlier, so she was open to her sister's gaze on her wet nether region.

Megan reached down and felt at her sister's vagina. Touching her like this, so **** and submissive, made Megan unbelivably horny. She thought about ordering her sister to go down on her right then and there, but gathered her self control and only said, "Good girl, Ellie."

Megan felt her sister's damp pussy go immediately slick and wet. She grinned like a predator, "Oh oh oh. It looks like I was right. You do get off on it. Admit it. Tell me it turns you on to be my pet. Speak."

At the command, Elizabeth yapped, "Arf! Arf!" and slapped a hand over her mouth. What had she just done? Admitted (in a way) to her sister that she liked this? No no no, it was too much to process right now.

In a small voice, she tried to salvage the situation. "M-Megan, please, can I just have a minute? I think I need to be alone. I don't know what is going on, or if maybe it's affecting you too. I just, need a minute." She reassumed her begging posture, trying to get her sister to take pity on her.

Megan considered her sister. "Fine, but the collar goes back on, we've already established it isn't controlling you." She clicked it back into place and locked it without waiting to see what Elizabeth's reaction would be. "Now, go have your time to think. I need to do some work."

Elizabeth got up and ran to her room, and cried herself to sleep.