She was Countess of Urgell in her own right; however, control over her estate passed to her husband, Alfonso IV of Aragon.
Before dying childless at La Llitera, Teresa's granduncle Ermengol X of Urgell agreed to make Alfonso heir to the County of Urgell, on the condition that Alfonso marry Teresa, who was his rightful heir.
Alfonso is reputed to have been so liberal in the expenses during the wedding, that the local counsels imposed restrictions on how much he could spend.
Teresa died whilst giving birth to her son Sancho on 20 October 1327 at Zaragoza, only days before her husband became king of Aragon.
[citation needed] Her younger son James inherited Urgell.