Is it valid for a virgin woman in her forties to marry with Al-Fatiha but without her guardian's consent, knowing that her father is unaware of it?

The guardian (wali) is a condition for marriage according to the most preponderant opinions of jurists. If the marriage takes place without the guardian's permission, it is an invalid marriage and must be annulled, and the contract renewed in the correct manner if there is a desire for the marriage. The sister has erred in two ways: her lying to her guardian and her proceeding with the marriage without his permission.