Debt question - Ontario, Canada

Country: Canada
Province: Ontario

My partner and I have lived together for a little over a year, are not
married, and have a 10 month old child.

I owned the house for six years before he moved in. Since moving in, he
pays the bills and I continue to pay the mortgage. (We split child-related
and other expenses, but not necessarily equally.)

I know he has outstanding student loans, and I have recently discovered that he has at least 2 \'maxed out\' credit cards, for $13,000 and $21,000. I have not yet asked him about these, and there may be more. I have no debts other than my mortgage.

Am I in danger of being held responsible for any of his debts?

Thank you,
Caroline