Madonna and Jesus Luz are getting married.
The Brazilian model's father Luis Heitor Pinto da Luz has revealed the couple are planning a Kabbalah ceremony to have their union recognised by the mystical Jewish faith followed by the 50-year-old singer.
However, their union will not be legally binding.
Luis said: "The Kabbalah ceremony in New York that will link up my son Jesus Luz and Madonna only confirms that he is extremely happy.
"I don't know if there will, in fact, be a real marriage between Madonna and my son. It will be a type of ritual, but I do not know Kabbalah or if the ceremony will have legal validity."
Luis - who confirmed the couple are living together in New York - revealed his 22-year-old son has bonded well with the 'Hung Up' star's three children, Lourdes, 12, Rocco, eight and David, three.
He added to Brazil's Quem magazine: "She has small children, and Jesus helps her out with various tasks involving all of them. He plays ball with the kids. Jesus has charisma and loves children."
Despite the 28-year age gap between Madonna and Jesus, Luis insists he approves of their relationship.
He said: "I've spoken by phone with Madonna - in French, because my English is not fluent - and she appears to me to be a normal and polite person. She is feminine. I don't feel she is a harsh person."
Madonna announced last October she was divorcing British film director Guy Ritchie after almost eight years of marriage.