Just days after Usher filed for divorce from his 38-year-old wife Tameka Foster, sources close to the couple are telling all to PEOPLE Magazine.

The 30-year-old crooner filed for divorce in Atlanta on Friday.

A friend of Tameka’s tells PEOPLE, the marriage was troubled from the start. Usher, whose real name is Usher Raymond IV, wasn’t ready to “settle down” when they were married in September 2007, according to the pal.

“They peaked before they even got married. Right after it was over, they started to drift apart. [Usher] just wasn’t ready to settle down, at least not with her,” the insider reveals.

The couple began spending more time apart and only came together for their sons, 18-month-old Usher and 6-month-old Naviyd. “They’ve been going their own way for awhile. They don’t spend a lot of time with each other. When they were together, it was all about the boys,” the friend adds.

Another source, who asked not to be identified, says no one expected the marriage to last. “No one I’ve spoken to is surprised. As bad as this is gonna sound, it was never a matter of ‘I wonder if they’ll divorce,’ but more like ‘I wonder WHEN they’ll divorce.’”

Attorney Randall Kessler, who is representing the former celebrity stylist in the divorce, says Tameka will respond to the divorce petition in a “timely manner.”

“We were hoping this case would be resolved privately, but since Usher filed it publically we will have to respond.”