On the 19 June 1373, Joanna married John I, Count of Ampurias. This was his second marriage after the death of his first wife Blanche of Sicily. Joanna was 29 at the time of the marriage, she was considered an older bride.
Many members of her family showed dislike to her father's fourth wife Queen Sibila, due to her low ranking birth and her family's interference at court. Joanna's husband John came into conflict with Sibila, and then rebelled against Joanna's father.[citation needed] The marriage of Peter and Sibila also led to a strain between himself and his three surviving children: Joanna, John and Martin.[1]
Joanna and John were married for twelve years, in this time they had two sons: