Thanks for giving your locale. We call your situation a "Hobson's Choice" (either the fire or the frying pan...) At first glance it seems you can't win. You do have the right, in Canada, to expel the person with the offensive body odor. Absolutely. But you are correct in that if the expelled person can find an attorney you could be sued for discrimination against a handicapped person. To insulate yourself from such a claim, try to have 2 witnesses who are as independent as possible (not your daughter or your husband) but adults who have nothing to gain- as witnesses to the stink and to the expelling. You won't be sued once it is known that you have two independent witnesses or, if you are sued, you will win. Lastly, you should be concerned about disease and infection being spread from a person who has feces on them. If that is the cause of the odor then you have a much more powerful basis to expel. Good luck.