why does my 6 weeks old kitten k..

Brief：
she either sits/sleeps on either my feet or in my fiances slipper.Answers: she want to feel warm..try getting her a cosy bed before she outgrow your s.. 

If it makes you feel any better, I think mine spent the night in the bathroom sink last night. He's about 12 weeks old and obsessed with the sink! She is still very young and your feet and the slipper are probably about the same size and warmth as the litter mates that she no longer has (you know how they lay all over each other and snuggle). My cat never did that, but she was 1yr. when she adopted us. Our puppy that we got at 3mo. used to do that with my husbands foot all the time and still does occasionally (she's 6mo. now). I don't think it's anything to worry about, it's just very cute and helping her to bond with you! I would think it is a comfort thing. She is VERY young and has probably just left her mother. Having said that it sounds like she will be a cat with a foot fetish later. Some cats just love the smell of feet. I can't tell you why but 3 of the cats I have owned the present one included loved feet. My present cat chases my feet. Because she loves you, and she likes to be near you. When Cadie was a kitten she used to sit on my feet when I came home from work. She sleeps on my jacket, I think it's because my smell is on there, and she feels closer to me, that could be the reason for sleeping in the slipper. =)