Ok, Ozric seems to have answered my questions, and of course you make a good point. It's probably best to have a mediator when you meet with this woman. And if Jasper says it's a floor-creaking problem, then every apartment must have it. I can be a little sympathetic in that not all elderly people have saved for retirement, and perhaps she can't afford to move. I seriously don't buy that she has a business run out of her home. I think she's just home all day.
I also think if, judging by Ozric's name, that perhaps there is a bit of Xenophobia tied in here? It wouldn't be the roomate making the noise because he's not a foreigner? She probably wouldn't even admit that herself.
And I jump in and defend my apartment-dwelling overweight brothers and sisters and say someone of just about any size can learn not to walk flat-footed. It's a technique thing, not a weight thing. I know because I am the roundest person in our apartment, and also the quietest (we've tested, since I gave my husband a lecture in being a flat-footed monster!). Somehow it's something I picked up from mom, while dad is a flat-footed moster as well.
You know who the loudest person is in our apartment? The 8lb dachshund, seriously, so it's all relative.
A bit OT, but I had to say that. I've been noticing lately such words in the forum like "fat" and "ugly" as meaning the same thing to most people. It's sort-of my theme for the evening, but to make those words mean the same in your vocabulary is to take more narrow-view of the world. And how many head-fiers are in tip-top shape? Not many, I gather, so think about it before sitting around and insulting yourselves.