I'm not entirely sure which specific 'Forgive us our trespasses' real story you are referring to. It could potentially be related to a religious parable, perhaps within the context of Christianity where the phrase is part of the Lord's Prayer. It might be about a person's journey of seeking forgiveness for their wrongdoings, real - life experiences of remorse and redemption in a religious or moral framework.
I don't know as I haven't read it. But it's likely to have the ex - the person who is not going to be forgiven - and the protagonist, the one who has been wronged and is holding the grudge.
You could start by looking in religious texts if it has a religious basis. For example, in the Bible if it's a Christian - related story. Churches or religious institutions might also be able to direct you to relevant literature or teachings that contain such a story.
Maybe it was created by an ancient magic. Some powerful wizard or sorcerer might have used dark or forgotten spells to bring the stone monster to life.
The title 'never forgive you my ex novel' gives the impression that the story will be centered on a relationship that ended very badly. It could be that the ex did something unforgivable like cheating, lying, or causing great emotional harm. The novel might then explore how the main character copes with these feelings, whether they try to seek revenge, or simply try to forget and start a new life while still holding onto that anger towards the ex.
I'm not sure specifically as there could be many stories with that title. It might be about a monster that has some kind of special quality or experience that makes it not cry, perhaps it's a very tough or emotionless monster.
Voldemort is an obvious one. Given all the destruction and death he has caused, it's very likely that Harry would never forgive him. His actions led to the loss of many innocent lives, including Harry's parents.