Having taken Margaret home,we sat drinking tea as we chatted about this and that as we usually do.it is wonderful how well we get on,quite apart from our little sessions. 'Why don't you try on those lovely knickers Margaret?' i ventured.'I think they are very pretty and i'm sure they'd look very nice on' i added. Margaret blushed shyly,and then smiled and said 'Ok,just a jiffy'. Margaret returned to the living room in just her big underwired bra and the mauve knickers,my manhood stiffened at the sight of her large floppy breasts pushed up by her brassiere and of course the tight fitting knickers that went almost up to her navel. I could clearly see the outline of Margarets vulva, and this excited me greatly,even though i have seen her vaginal opening and even her enticing anus during her punishments at my home. The seat of the knickers where stretched drum tight by the size of Margarets big wobbly bottom,and i groaned aloud at the spectacle. 'Right, now then,you naughty girl.hands on your knees and bottom right out!' i said loudly and with a smile. Margaret sighed and rolled her eyes skywards,and then complied. Six times my broad palm cracked down on Margarets splendid,ample rear,causing her to yelp at the burning,stinging sensations ignited in her buttocks. I repeated the proceedure for every pair of the wonderfully filled drawers.