Madonna has been left "bereft" after accepting her son will be staying in London.
The 57-year-old singer is currently thrashing out a custody agreement with ex-husband Guy Ritchie over the care of their 15-year-old son Rocco - who left her 'Rebel Heart' tour in December to be with his dad and defied a court order to return to the US for Christmas - and has reportedly told friends she has accepted the youngster won't be living with her any more.
A source told the Mail on Sunday newspaper: "The fact is Madonna has now accepted Rocco isn't coming home and that his home is now with his dad. Rocco wants to be with his dad but she won't give up being his mother.
"She won't stop fighting to try to make sure Rocco is kept safe and has what he needs. She can't understand why it has come to this. Her world has been shattered."
However, before she agrees Rocco can live with the 47-year-old filmmaker, his wife Jacqui Ainsley and their three children, the 'Hung Up' singer has drawn up a list of conditions.
These include clarity over access arrangements for her to see her son, designated times when they can contact one another, and arrangements for Rocco to remain in contact with Madonna's other children, Lourdes, 19, and David and Mercy, both 10.
In addition, the 'Papa Don't Preach' singer wants assurances from the 'Man From U.N.C.L.E.' filmmaker over Rocco's safety and supervision, including the use of bodyguards who would be able to mingle comfortably with teenage crowds, clarification over the boundaries he is given, and involvement in decisions made about the teenager's education, as well as access to his teachers.
Madonna also wants the agreement to be thrashed out in the US rather than the UK, as parents retain greater control over their kids until they are 18, whereas in Britain 16 year olds are given more freedoms.
At a hearing at London's High Court earlier this week, Madonna and Guy were urged to reach an "amicable" decision in the best interests of their son.
Judge Mr. Justice MacDonald said: "It would be my fervent hope that discussions between the parties can reach an amicable resolution.
"An amicable negotiated resolution is definitely the way forward and in Rocco's best interests ... Unfortunately, Rocco will have to experience additional emotional upset."
The hearing came after a New York court ruled that Rocco should stay in London with his father for the meantime so he can attend their chosen school.