Jose, single, donated a house and lot to his only niece, Maria, who was of legal age and who accepted the donation. The donation and Maria's acceptance thereof were evidenced by a Deed of Donation. Maria then lived in the house and lot donated to her, religiously paying real estate taxes thereon. Twelve years later, when Jose had already passed away, a woman claiming to be an illegitimate daughter of Jose filed a complaint against Maria. Claiming rights as an heir, the woman prayed that Maria be ordered to reconvey the house and lot to Jose's estate. In her complaint she alleged that the notary public who notarized the Deed of Donation had an expired notarial commission when the Deed of Donation was executed by Jose. Can Maria be made to reconvey the property? What can she put up as a defense? (4%)