 Complete the following phrase:  The ill feeling between father and son was increased when in 1447 John took for his second wife Juana Enriquez, a Castilian noblewoman of a bastard cadet line from Castilian kings, who soon bore him a son, afterwards Ferdid II of Aragon, and who regarded her stepson as an interloper. When Joanna began to interfere in the internal affairs of Navarre, 