So to be crawling along the carpet towards her outstretched foot was odd in the extreme. Kathy, too, looked somewhat uneasy, but she had started, and I knew she was never one to quit half-way through; Kathy would see this through to the end, that was for certain. And that meant that I would have to as well, whatever I felt about it. I was distinctly embarrassed to be in this position, subservient to one of my oldest friends and crawling, half naked across the floor towards her upraised foot; embarrassed, but somewhat excited, too, I had to admit.

I took hold of her foot and slid off her shoe. It was a hot summer day, and she wore no tights or socks; her foot let off a faint but persistent aroma of sweat, but it was certainly not unpleasant, and gently I stroked it with my finger, running my nail down her sole. She shivered and giggled. "Tickles," she said. I smiled and carried on. She had a nice foot. The toes formed a wonderful, straight line as they joined the foot, quite unlike mine, which form a parabola, rising from the big toe to the second, and then down to the fifth. I read somewhere that people of Celtic descent have straight toes, but since I have a fair amount of Celtic blood in me I am unsure whether that is true or not. Her toes were long and slender, and the nails neatly trimmed: clearly, she used nail scissors to cut them and didn't pick them with her fingernails. Her foot was elegant, slim and neatly arched, with a thin, almost bony heel, and as I held it, caressing it, I thought it quite beautiful.

Holding her foot with my left hand, I began to massage and stroke it, running my fingers between her toes, pressing and caressing, stroking the ball of her foot, tickling up and down her sole and returning again to her delightful toes. Kathy watched me intently as I performed for her, never taking her eyes off me. I fixed my gaze on hers and lowered my head towards her foot. Feeling her big toe against my lip, I adjusted my position and slid it into my mouth. Still staring at her, I began to suck on it, running my tongue up and down the nail and rasping it against the underside of her toe. She sighed, but made no movement. I continued to suck on her toe for some moments, and then opened my mouth wider, slipping another couple of toes into it. Again, I played my tongue around them, sliding it between them and running it up and down; Kathy shivered again as my touch sent a spasm tickling through her. The taste in my mouth was strong, rather musky, but really quite pleasant; I found it strangely erotic, and it spurred me on to suck harder and lap longer on her. Lifting her foot slightly, I traced my tongue the length of her sole, from her big toe to her heel, and back again, planting myriad kisses on her moist and glistening skin as I passed along it. Finally, I returned once more to her toes, and fed them into my mouth, one after the other, to recommence sucking on them. I sucked and stroked and caressed and cajoled them for five minutes, until finally Kathy sighed and pulled her foot away.

"Mmmm," she said, "now that was nice. Thank you, Harriet."

"Pleasure," I replied, sitting gingerly on the floor. I was still naked below the waist, and my bottom was red and throbbing from my Master's punishment. I looked over at Siobhan, who had been silently observing my mission with Kathy's feet.

"What about you?" I asked. "Would you like me to do you, too?"

"Oh God, no. I can't bear anything touching my feet. Drives me up the wall."

I was silent for a moment. "So is there anything you would like me to do for you?"

It was Siobhan's turn to be silent. Finally, she said, "Harriet, I'm having difficulty dealing with this. You're an old friend, it's so strange."

"Don't worry about it," I countered. "I'm cool about it. It's what I want. Just join in if you want, and if you don't, no worries." I smiled at her encouragingly.

"God, I wish I'd known you were like this five years ago!" she laughed. "Could have had so much fun. Not to mention the fact we could have got you to do all our washing and ironing for us..."

"Now I do draw the line somewhere!" I laughed. "So, is there anything you'd fancy?"

"So you're telling me that you'll do anything I say, then, will you?"

"Apart from the washing and ironing, yeah." I was getting that familiar tingling in my stomach, that anticipatory palpitation when I think I might be on the verge of an interesting experience. I looked at Siobhan, curiously, trying to gauge whether she would have the nerve to suggest anything. I wasn't as sure about her as I was about Kathy: Siobhan had always been daring, but within her own parameters. She had usually been the first to suggest a night on the tiles, and then get off with someone, the first to disappear to her room for a rampant session; and yet I always got the impression that she was rather more straight-laced than Kathy or me, less likely to insist on working her way through the Kama Sutra in a love-making tryst. Would she dare? Would she join in?

"Okay then Harriet," she said finally. "If you're so determined to be humiliated, if you get off on it so much, try this one for size. Come over here and kiss my arse."