Mary J. Blige isn’t happy with her estranged husband, which makes sense because more details are coming out in court documents.

The singer claims Martin “Kendu” Isaacs spent her money on his new girlfriend. In addition, Mary wants the new girlfriend to support Kendu's kids from a previous relationship.

TMZ obtained new legal documents filed by Blige in court over the divorce. Not only is she not happy about the split, but says Isaacs, who was also her former manager, spent more than $420,000 on “travel charges.” Pretty ambiguous, and probably for good reason. Blige claims those expenses were not business related and in fact, was money Isaacs spent on his side chick.

Previously, Kendu Isaacs requested more than $110,000 per month in spousal support, to which Mary J scoffed at. She doesn’t believe she should be responsible for her ex’s parents and children from another relationship. Even if she agreed, it’s been reported that the singer’s estate is “underwater” to the tune of tens of millions of dollars.

Yikes.