I allowed my hands to go to my sides as I calmly walked over to my uniform in the corner of the room and retrieved my handcuffs. Sandra looked at me in horror as I twirled them in my hand. It was then my Dom voice decided to surface. I hadn't used it in years since before Kayla's mother became my wife. As I neared my daughter's accomplice, I could see her eyes scanning me up and down. I was wearing a bath robe over my boxers to hide the excitement I was feeling at that moment. As I edged closer, Sandra looked at me.
"You are not going to arrest me. I'm Kayla's best friend," she replied almost snottingly. I quietly went behind her and began to whisper in her ear how much of a bad girl she was to hide my daughter's motives from me and how much of a slut she was dressed like. She blushed as I snapped one cuff on her left wrist. It was then the shock appeared on her face as I cuffed the right hand. I then reached behind her and unzipped the dress she was wearing before simply ripping it off of her so she was totally naked before me. She remained quiet as I surmised she would.
I then pushed her to the floor where she immediately landed on her knees. Excellent work I though to myself as I noticed a black nub protruding from her rectum. I asked her to tell me what was there. She looked down to the floor before revealing that she wore a butt plug. It was part of a bet my naughty daughter made with her earlier in the night before she returned to the house. I then moved to in front of her where I allowed my robe to drop and revealed my boxers scarcily concealing my erection before her face. Sandra's face opened up as well as her mouth. I simply slid my boxers so that my erection was protruding out of the opening right where her open mouth was. I then took advantage and allowed my shaft to slide just within her mouth. She instinctively tried to suck before I unceremoniously pulled it back out and smacked the side of her cheek with it. I scolded her for not waiting before again sliding it back into her mouth where she held it just the way I wanted. The little slut was learning.
Slowly, I eased my cock deep inside her mouth until I could feel the back of her throat. I strived to be careful because I didn't want to gag her. It turned out that Sandra was a fellatio scholar as I commanded her to suck and I felt her suction on the end of my cock. I stayed in that position for a while until I was basically fucking her throat while she knelt there handcuffed. It wasn't long until I felt myself getting ready to climax. I allowed my cock to fall out of her mouth as I began to stroke it until I had my seed spraying over her face and tits. Sandra didn't shy away from it, but opened her mouth to catch whatever she could in her mouth. She then asked permission to stand up.
I was so impressed with Sandra's behavior that I started to use her as my new sub while my daughter went out whoring herself. Kayla was against me seeing her best friend so much, but her guilt over her behavior kept her in line. We spent the good part of a year taking care of each other. I would bind her with the ropes I had in my closet or cuff her hands and use her for my personal cum dumpster. She seemed to enjoy me taking over the way I did. Soon after, my daughter was knocked up by an anonymous suitor and it drove a wedge between Sandra and I for a while. It was a few months later that Sandra moved away so that she could pursue her graduate degree. She still on occasion comes by to visit to relive our past.