Mary J. Blige's Husband Asking For Spousal Support

...and it's not just a little bit either.

It's more than $129,000 a month.

Multiple reports say Kendu Isaacs is trying to keep up his lavish lifestyle with a personal trainer, personal chef, etc.

He also wants her to contribute to the child support he has to pay for kids from a previous relationship.

And apparently she's already given him $85,000 since their split.

He was her manager until this all happened over the summer.

They were married for more than a decade.