Usher's ex-wife has accused the singer of feigning grief over the sudden death of her son in a bid to win sympathy in their bitter custody battle.
Tameka Foster slams the star in newly-filed court documents, claiming he visited his former stepson, Kile Glover, in hospital only once before the 11-year-old was taken off life support.
According to TMZ.com, Tameka is asking the judge to deny her ex's request to delay their next custody hearing, claiming he is only pretending to need the extra time to mourn Kile's death.
Usher, real name Usher Terry Raymond IV, and fashion stylist Tameka, who divorced in 2009 after two years of marriage, are currently fighting for custody of their two sons, Usher Raymond V, four, and Naviyd, three.
According to TMZ, Usher, 33, requested their August 13 hearing be delayed, claiming heading to court 'in the immediate wake of this tragedy' would cause 'unnecessary stress and strain' for all parties involved.
He also fears the court might rule against him in the case in favour of a grieving mother, according to the website.
But Tameka has scoffed at the request in subsequent filings, claiming Usher's attempt to delay the hearing is 'simply a transparent sham', calling his feelings for Kile 'bogus', reports suggest.
The grieving mother claims Usher 'visited Kile in the hospital only once' in the 15 days he was on life support following a freak boating accident last month.
She also claims Usher refused to tweet a message asking followers to 'please pray for Kile', instead opting to tweet a photo of his breakfast.
Tameka asks the judge to move forward with the hearing as scheduled, and claims it will help her to move on from the tragedy, TMZ reports.
Kile Glover, Tameka's son with Atlanta-based clothier Ryan Glover, was struck in the head during a jet ski collision while riding an inner tube on Lake Lanier in Atlanta, Georgia on July 6.
