Rocco Ritchie's brother is heartbroken over his move to London.
The 15-year-old son of Madonna and Guy Ritchie is at the centre of a custody battle after moving to the UK to live with his dad but his little brother David, 11, is said to be missing him terribly.
A source told the Sunday Mirror: "Everybody is talking about Madge and Guy 's fight over Rocco - but there's much more to it.
"The dispute is hard on the whole family, and David is really feeling it. David very much looked up to Rocco in that big brother role.
"But they rarely see each other now, and the longer this continues the more upsetting that will become for him."
Rocco left Madonna's 'Rebel Heart' tour late last year to stay with his father and subsequently defied a court order to return to his mother and siblings which also include Lourdes, 19, and Mercy, 10, for Christmas.
Meanwhile, it was recently claimed that Madonna has demanded Guy leave their sons out of a documentary about his family and Kabbalah.
The 57-year-old pop legend has scuppered her ex-husband's and his new wife Jacqui Ainsley's plans to release the film which would reveal the family's connection to the religion, after she refused to allow Rocco and David be a part of it.
A source shared: "Madonna is the one who introduced Guy to Kabbalah and she doesn't want it to go ahead. It was top secret, but she found out about it because David told her.
"She doesn't want Rocco or David to be in it, and they are having to rework it. It's caused a big problem.
"Now the whole thing could be shelved. It's caused a lot of added stress."
Guy doesn't follow the religion which derives from Judaism, though the film - shot at Guy and Jacqui's Wiltshire home - was set to explore the whole family's interest in spiritualism.
The source added: "This has been a very special project for Guy and Jacqui, something they have worked very hard on. They hope they can work it out."
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