d**gged Mother In Law - Sex Stories

d**gged Mother In Law

d**gged Mother in Law "Goodnight Christopher!" I watched my mother in law as she climbed the stairs to her bedroom and I heard the door close behind her as she went off to bed, carrying the mug of hot milk her considerate son in law had made her as a nightcap. She always said coffee kept her awake. I smiled to myself - this particular mug of milk was intended to have the opposite effect. If my contact with the chemistry degree was telling the truth my old bitch of a mother in law was soon to be in a very deep sl**p indeed. I'd been waiting for this opportunity for years and had planned tonight from the moment my wife told me that she would be away overnight as she had to work a night shift. Her mother had been staying with us as it was Christmas and was due to go home the following day. This was my only chance to be alone overnight with the old witch. The secret ingredient I had added to her nightcap was the latest evolution of what was known as rohypnol but Roger, my chemist friend, assured me that it was much more predictable and, as he put it, "pervert friendly". "You just need to know their approximate weight to get the dosage right - don't want them waking up at a crucial moment or sl**ping for 24 hours! The beauty of it is that this stuff is liquid, completely undetectable in any drink and doesn't make them feel d***k - just sends them gently to sl**p. And once they're under they stay that way for six hours and wake up feeling fine - no hangover. They never suspect ...

... anything." He told me he'd used it on scores of females - all sizes, all ages. As he said, "I always say lots of women have slept with me - they just don't realise!" My only concern was trying to find my mother in laws weight but Roger gave me a chart. All I needed to know was her dress size - a good enough indication of how heavy she was - and that would give me an accurate enough start point. Then I just needed to decide how long I wanted her "out" for. I'd had a sneaky peek around her room when she was out of the house and read a few dress labels. Then I consulted the chart. A woman who took a size 20 dress needed 20ml to put her to sl**p for six hours. The liquid came in 10ml vials so that was how many vials of the clear, odourless liquid I added to mother in law's bedtime milk. Now all I had to do was wait for mother in law to drink her milk and go to sl**p. I was so impatient as I heard her visit the bathroom and clatter round in her pre-bed routine. Finally it all went quiet. I imagined her drinking her milk, setting the mug down on the bedside table. I knew it took the d**g 10 minutes to take effect and it was agonising watching the clock tick round. I'd decided to wait 30 minutes - just to be on the safe side. Finally I reckoned the d**g should have had more than enough time to work. I climbed the stairs and knocked on her bedroom door. There was always the chance she hadn't d***k her milk and was sitting up in bed wide awake but there was no reply to my knock. I opened ...