Spousal liability for past debts

No.  The only way your past debts can reach her money is if it's in an account (or property) that's in both of your names.  So, very simply, you don't have a joint bank account, if she buys a house, your name stays off it.

Originally, the law looked at a married couple as a single "person" and the husband controlled the money, usually, even if it had come from his wife or his wife's property.  That's ancient history now;  your creditors can't sue your wife, for pre-marital debts, since they have no contractual connection to her.