[2][3] King Denis in his October 1298 will stated that the Queen would specifically administer and instruct his illegitimate children, and provided that they would be disinherited if they were to dishonour or disobey the authority of Infante Afonso.

[7] Afonso named him royal representative to the peace agreement between the kingdoms of Castile and Portugal, but illness prevented him from accompanying Archbishop Gonçalo Pereira to the meeting.

[7] Francisco Brandão indicated that Pedro Afonso was recognized at Court (in Portugal, Castile and Aragon) as a man of "great opinion, discreet, valorous, and generally applauded by those of important rank in Spain".

In his five-volume work, the Monarquia Lusitania, Friar Francisco Brandão reported that the child was buried in Santa Maria dos Olivares, in Tomar, where the church records refer to the burial of "a nephew of King Denis".

[5] After his separation from Maria Ximénez,[10] the Count started a relationship with Teresa Anes de Toledo,[10] a lady-in-waiting to the Queen Consort of Portugal Beatrice of Castile, wife of King Afonso IV.