Black Widow Spider

While putting out the garbage this evening, I noticed a rather large black spider in one of the garbage cans. A black widow! It had the tell-tale red marking on its abdomen. But in Ontario? Apparently they inhabit temperate regions around the world, including southern Ontario.

She is now safely housed in a bug container. So now what? I don't like killing spiders but I can't just let her go. Suggestions welcome.