Tameka Foster Denies Accusing Usher Of Drug Abuse

The custody battle between R&B superstar Usher and ex, Tameka Foster is heating up as reports have surfaced that Foster accused the singer of popping pills in front of their two sons - Usher V, 4, and Naviyd, 3. But according to Tameka, she isn't the one behind the nasty rumors and never asked for Usher to be tested for narcotics.

"I never accused him of drugs," Foster tells Star. "My attorneys requested the test, not me. I'm merely in defense mode."

Raymond, 33, filed for divorce from Foster in 2009 after two years of marriage.

Though they currently have a shared custody agreement, Tameka alleges that Usher has failed to comply with the conditions of that arrangement on several different occasions, and therefore is now requesting sole custody of the children. Foster is also asking that the court modify child support payments due to the "substantial change in [Usher's] income" since their divorce.

"He started this, I didn't," says Tameka, 40. "My kids are my life. I'd never compromise."

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