During the third week Mistress was expecting her period, so on Monday night she was more than keen to avail herself of my tongue once again. Being a complete pussy-slut and an always willing slave, I was more than happy to oblige and after I had made her cum she told me to kneel up on the bed between her legs. I did so and shrugged the sheets back off my shoulders. She congratulated me on my good work and then used her foot to tease my cock and balls, causing me to rise to full mast in a matter of seconds.
As she continued she became a little rougher, squashing my cock against my thigh or my pelvis with the base of her foot, or occasionally giving me a soft kick to the balls. She watched me face intently as she registered my reaction to every movement and gradually opened her legs to give me a good view of her dripping wet slit.
She stopped for a moment and reached over to open her bedside drawer. Her favourite glass dildo appeared and before long she had it buried inside her wet pussy. My cock ached as I watched her, watching me through half closed eyes as she stretched her tight cunt with the glass prick.
I could feel every ounce of cum that was swimming around inside my balls now, it was over a fortnight since I'd cum and I was well and truly in the zone. I opened my mouth to speak, wanting to ask her to please let me cum, but I knew it would not do me any good, and would probably make it worse.
The full length of her foot pressed against my cock as it was pushed firmly against my stomach. I could have cum just from that if I'd wanted to, the sight of her fucking herself with the glass cock was so horny and the pressure from her foot was more than enough to push me over the edge. But I knew that I had to fight, I knew that I had to wait for permission to cum, and that was not going to be forthcoming for a long time yet.
Finally she stopped and removed her foot. She spread her legs wide to give me a better view and then vigorously fucked herself with the length of hardened glass. My cock twitched as I watched and once again I was having to force myself to keep my hands at my sides, but it was getting harder and harder with every passing day.
After a while she moved to one side of the bed and bid me to come and lay next to her. I did as she asked and she used her free hand to guide me onto my back. She pulled the glass dildo out of her silky, wet cunt and used it to tease the length of my cock before offering it to my mouth to clean. I greedily slurped all her juices from the ribbed toy and then she replaced it easily in her slippery hole.
She leaned over me and kissed my chest, then bit one of my nipples before kissing me full on the lips and tasting her juices on my tongue. She groaned as she felt the dildo press against her clit and in a moment she had straddled me and moved up my body so that her pussy was right above my chin. She buried the dildo inside her hole and then sat on my face, ordering me to lick her clit while the dildo stretched her pussy. The base of the dildo was somewhat in the way but I did the best I could. Soon I found I could use my chin to press on the base of the dildo which moved it down just enough that I could get to her clit properly. The extra downward pressure also meant the top of the dildo pressed upwards against her G-spot and Mistress groaned appreciatively.
After a while she tired of this and lifted herself up and removed the dildo, her pussy was sopping wet and a beautiful deep pink colour. Wasting no time, her pussy was soon back over my mouth and she ground her cunt against my face, making her wetter and wetter all the time.
Finally she lifted herself up and moved down the bed so that her pussy was right over my throbbing cock. She lowered herself down and her lips slipped around the underside of it, pressing the length of my cock against my stomach. Now she started grinding herself against my cock instead of my face and I was trembling as I fought the urge to cum. I looked up at her, her gorgeous tits swaying gently as she rocked back and forth, teasing my poor aching meat. I was in Heaven and Hell all at once.
She lowered herself down so that her nice full tits pressed against my chest and her lips met mine. We kissed for several minutes as I endured the torment of her hot, wet, dripping cunt sliding gently up and down against my cock.
"Do you want to be inside me?" She asked quietly.
"Oh God yes Mistress," I groaned.
"Do you?" She continued. "Is that what you want more than anything?"
"Yes Mistress," I breathed. "Please let me inside your beautiful pussy...."
"Hmm, maybe...." she whispered, grinding her pussy against the head of my cock as hard as she could. "But you have to give me some reassurances first."
"Yes Mistress, anything..."
I heard her chuckle softly to herself.
"First, you must promise not to cum, no matter what..."
"Yes Mistress."
"Second, you must tell me when you are getting close to cumming..."
"Yes Mistress."
"And third, you must promise to keep absolutely still."
"I will Mistress, I promise."
"Are you sure you can do all those things slave, even if I make it really hard for you?"
"Yes Mistress, I'll try my best..."
"Not good enough slave."
She ground her clit into my shaft once more, groaning as she did so.
"Maybe this is as much as you can take slave, maybe being inside me would be just that little bit too much...."
She ground herself harder still into my pulsing stalk.
"...maybe my warm, wet, silky pussy would be more than you can handle after two weeks without being allowed to cum?"
The thought of missing out on being allowed inside her after so long pushed me to the brink of frustration.
"Please Mistress..., please, I've GOT to be inside you...."
"Got to be, slave?" She taunted. "There is no 'got to be' slave, there's only Mistress's pleasure and... "
She drifted off as once again she used her dripping cunt to grind my throbbing prick into my stomach until I let out a load groan of frustration.
"...but since you've been such a very good slave for the last two weeks, I do think you deserve a little something...."
She reached down between our bodies and curled her fingers around my solid prick. I gasped and without thinking thrust my hips forward to meet her touch. She squeezed my cock very hard and allowed the tips of her nails to dig into my flesh.
"...what did I say about staying still?"
"Yes Mistress, I'm sorry Mistress!"
"Do that once more and I won't touch your cock for the rest of the month!"
"No please Mistress, I'm sorry....please... don't... stop."