Mel B believes her estranged husband tried to prevent her from seeing her father before his death

And within her court documents, which have been obtained by TMZ, Mel claimed the final straw for her relationship was when the producer claimed he couldn't find her passport, meaning she had to delay flying back to the UK to be with her terminally ill father, Martin Brown, as she believes he had deliberately hidden it.

The 41-year-old singer explained how, after learning of her dad's condition in November, she had expressed regret she couldn't visit him because of contractual obligations in New York.

She claims Stephen responded: "Suck it up. If he's going to die, he's going to die."

After completing her work in February, Mel decided to fly to the UK direct from New York and asked her spouse to send her passport from their Los Angeles home.

She explained: "I contacted [Stephen] in Los Angeles asking him to send my passport such that I could travel directly from New York to the UK to see my father. I told [Stephen] precisely where my passport was. [Stephen] claimed he couldn't find it, he claimed that it was nowhere in the house.

"I was forced to delay my travel to the UK. I had to return to Los Angeles to retrieve my passport.

"I was unable to find my passport despite specific recall as to where I had left it in the house. I believe [Stephen] took my passport so as to intentionally delay my travel such that I would not see my father prior to his death.

"I was forced to apply for an emergency passport to allow my travel to the UK."

Luckily, Mel received the documents in time to return to Leeds just days before her dad passed away.

The 'America's Got Talent' judge - who has daughters Phoenix, 18, and Angel, nine, from past relationships and Madison, five, with Stephen - had been estranged from her family for several years after they expressed concerns about her marriage, and within the court documents she also described how the producer "went ballistic" when he learned she had taken the children to visit her mother last November and was "screaming and shouting profanity" down the phone at her.

Stephen has denied all the allegations against him and says he has been left "distraught" by her claims.

He told TMZ: "I haven't heard these allegations. You know what my comment on this is, as this is the mother of my children? I'm really really distraught in my brain by how this is going to affect our children and the depths that she's gone to. I'm shocked at those allegations and that's what it is. I think someone's set me up to look like a bad guy. Obviously you saw my house got raided and nobody found anything. It's accusation after accusation. But we'll have our day in court. And we have children. if anyone knows our children, we have beautiful children. They're on social media. Why do this? We were friends two weeks ago. And now all of a sudden the team gets around and now it's got to be this."