Now, at least in Ontario, you don't necessarily have to live together to have to pay spousal support
No home or kids together but couple still spouses, Ontario’s Appeal Court rules
A wealthy businessman will have to pay more than $50,000 a month in spousal support for 10 years to a woman with whom he had a long-term romantic relationship even though they kept separate homes and had no children together, Ontario’s top court has ruled.
Under Ontario law, an unmarried couple are considered common-law spouses if they have cohabited – lived together in a conjugal relationship – continuously for at least three years. But that doesn’t necessarily mean living in the same home, the court found.
“Lack of a shared residence is not determinative of the issue of cohabitation,” the Appeal Court said. “There are many cases in which courts have found cohabitation where the parties stayed together only intermittently.”
https://www.theglobeandmail.com/canada/toronto/article-no-home-or-kids-together-but-couple-still-spouses-appeal-court-rules/
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$6 million total over 10 years. He'll be 75 when it's done.