Hi! My name is Aj and Im an Independent Advisor here to help! I understand your frustration. Since the account is blocked it will take 24 hours to last but sometimes longer. For now, wait for 24 hours to try again and make sure to use a device and location your wife has used before, as this helps Microsoft recognize the account.
After the waiting period go to https://account.live.com/acsr and fill in as much information as possible like old passwords, emails you sent recently, account creation date, or any services linked to the account.
Also check this link for additional help like "Sign in Helper" tool