To eliminate any possible confusion I suggest you read Parts 1 and 2 first as this is a continuation of that story. This chapter contains scenes of which some readers may disapprove in that the D/s element is a little more extreme. If this is not to your taste then I suggest you read no further.
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"She seems happy to let us do what we want to her," I commented, "why don't you nip upstairs and bring down the toy box while I retrieve her laptop from the car."
She went off grinning broadly and I went out to the car and grabbed her bag. I brought it back to the kitchen table and looked inside. Apart from the laptop there was the usual array of bits and pieces. I took out her purse and opened it. Her driver's licence told me her name and address. I closed it and put it back in her bag. I pulled out the laptop and to my delight found it still switched on and logged in. When I opened it the screen showed a page of what seemed to be an erotic story. This helped to explain her activity on the train. I read a little of the story as Miss returned lugging a large wooden box with her. Her eyes lit up when she saw the bag and the laptop.
"Any joy?" she asked.
"Our new slut has been reading dirty stories," I announced, "but before we get into that we should make sure our guest is safe and 'secure'."
I stood up and grabbed one end of the wooden toy box. Miss took the other and we went back to the living room. Slut was still as we had left her, sprawled on the sofa under a blanket although it had slipped enough to reveal one breast. Her breathing was slow and relaxed. We dumped the toy box at her feet and sat one on each side of her. I flipped open the lid of the box and rummaged around inside before I found the wrist and ankle cuffs I was looking for. I passed one of each to Miss and we slowly and gently moved her arms out from under the blanket and fastened a cuff to each wrist. On the top corners of the sofa were two finials to which were already fixed a length of cord with a loop on the end. They were left over from some fun and games I had had with Miss a few evenings ago. I nodded to Miss and together we lifted each arm and clipped it into the loop. I sat back and relaxed a little, now she was going nowhere.
The sudden movement had begun to rouse her from her sleep and she moved a little and let out a moan.
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It took me ages to work out where I was let alone what was happening. Slowly the memories returned. Being naked in front of two strangers, two women. Having a huge orgasm but then ... nothing until now. I opened my eyes and saw the woman from the train sitting next to me smiling and brushing the hair away from my face. Momentarily I felt comforted until I tried to move and found my arms were spread wide and held tight on either side of me. I tugged at them and started to panic.
"Shhhh little slut you are quite safe. We just want to have a little fun. I'm sure you wouldn't deny us that."
I looked into her eyes and there seemed to be only kindness in them. I glanced either side at my arms and saw the black leather wrist cuffs fastened to the back of the sofa. I tried tugging on them but they were too well fixed. Then I felt something going on with my legs and looked down. The other one, the young pretty one, was fixing a second pair of cuffs to my ankles. I tried to kick her away but felt a sudden and stinging smack on my pussy.
"Stop struggling, slut, or there's more where that came from."
I lay back quietly, totally bewildered. One leg was pulled to one side and clipped in some way to the bottom of the sofa. The same process was repeated on the other leg. I was now lying spread-eagled and helpless sprawled across the sofa. I tried to struggle but found I could barely move.
"What the fuck! Let me go you crazy bitches."
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When she started yelling Miss gave her a hard slap on her pussy and then rooted through the toy box next to her. She took out our frequently used ball gag, bright red with black leather straps. She handed it to me with a grin.
"Stop yelling, slut," she hissed.
I leant across, dangling the ball gag in my hand and spoke quietly to the girl, "open wide for me and be a good slut."
She looked at me with a scared look and clamped her mouth firmly shut. I turned to Miss and nodded my head and she gave her exposed pussy another hard smack. The slut yelped loudly.
"Open wide and no more smacks I promise."
Slowly, nervously she relaxed her jaw and her mouth opened. I pushed the ball between her teeth and then pushed her head forward and fastened the straps tightly behind her head. I stroked her cheek and brushed the hair from her eyes and gave her a gentle kiss on the cheek. Then I looked back down to Miss who was searching once more in the toy box.
"Can I use the clamps on her please, Mistress?" she asked with a cheeky grin.
"I don't think she's going to complain any more do you?"
"She knows what will happen if she does," said Miss and gave her two very gentle taps on her pussy and then stroked her softly between her lips. "Oh wow! She's already wet again! What a slut she really is," and she laughed.
She pulled from the box a silver chain on each end of which was a shining butterfly clamp. Slut's eyes opened wide when she saw them and she tried to shrink away but without any luck. Miss held one of the clips up in front of her face and clicked it a couple of times before she grabbed one of her nipples with the other hand and tweaked it several times. Pulling the nipple towards her she let the clamp bite down. There was a muffled cry from slut which we both ignored. The other nipple followed and Miss let the chain that joined the clamps drape across her stomach. As a final touch she took out a black leather leash and attached it to the middle of the chain and let it dangle. The weight pulled her breasts slightly downward but they were too small and youthful to distort very much. Then Miss stood up and turned to sit on the other side of her and looked at me, smiling broadly.
"Doesn't she look lovely?" she asked me.