There is no offense, however serious, that the Church cannot forgive.
“There is no one, however wicked and guilty, who may not confidently hope for forgiveness, provided his repentance is honest.” [Roman Catechism I, 11, 5.]
Christ who died for all men desires that in his Church the gates of forgiveness should always be open to anyone who turns away from sin.
– Catechism of the Catholic Church, par. 982 –
[Bold emphasis mine]