Does this mean my spouse has no hope for conversion then?
Also I horrible committed mortal sin, have I been denied the grace of true repentance?
Unless someone has committed the Sin against the Holy Spirit, they can be forgiven their sins.
If we have fallen into serious mortal sin, then we are totally dependent on the Holy Church for the grace of true repentance and the reception of the Holy Sacraments. We should pray daily for the grace to resist temptations because living a life of deliberately committing venial sins can lead to mortal sins because we become careless.
The sin against the Holy Spirit, blasphemy, was committed by the Jews during the time of Christ when they declared that Christ worked miracles through the power of Satan, and not through the power of the Holy Spirit. (See the gospel of St. Matthew.)
A person would know without any doubt that they have blasphemed against the Holy Spirit because they will have deliberately, knowingly, and intentionally mocked Christ and denied that His miracles are divine.
Actors, pedophiles, and Luciferians who join in blasphemous Satanic rituals most likely have committed the sin against the Holy Spirit. As a part of selling their souls to the devil, they commit multiple blasphemies, including the sin of blasphemy against the Holy Spirit. They cannot be saved. They cannot repent even if they fear hell because the sin against the Holy Spirit cannot be forgiven in this life nor in the next.
Pray for your spouse. More importantly, pray with your spouse.