The source said: "Rocco has been the one reaching out to Madonna. She and Guy are not on speaking terms."
Despite making a move towards a reconciliation, Rocco is keen to see his mother - who also has children Lourdes, 19, David, and Mercy, both 10 - relax her strict rules before he will agree to return to live with her.
The source said: "Guy is very relaxed, while Madonna is strict and regimented.
"She is saying things will be different."
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News of the move towards a reconciliation comes just a few days after Madonna spoke of how much she "missed" her son.
She posted a photo of Rocco on Instagram and wrote: "I miss this boy.
"I hope we see that Leo Sun soon!"
- Bang! Showbiz