"The main concern for Madonna and Guy are their children – the security of their children in all senses of the word and the wellbeing of their children," rep Liz Rosenberg tells PEOPLE. "That's the priority for both of them moving forward. It's a sad situation."

The former couple, who have Rocco, 8, and David, 3, together and Madonna's 12-year-old daughter Lourdes with ex Carlos Leon, announced their divorce in a statement.

"Madonna and Guy Ritchie have agreed to divorce after seven-and-a-half years of marriage. They have both requested that the media maintain respect for their family at this difficult time," says the statement. The statement says they have not agreed to a settlement.