Kelis wants more dough. Not from her record label or business deals but from Nas, her son's father.

As TMZ reports, the "Milkshake" singer wants more than the $8,000 a month she's currently getting, because she says her boy Knight — who's 8 years old — has more expenses than he did when the first order was set up five years ago. Kelis also believes Nas has a lot more money these days.

Kelis wants to go half with the rap legend on all of Knight's expenses.

It's not clear exactly what she thinks that is, other than more than 8K a month.  A judge will determine what, if any, increase she gets.

Do you think $8,000 per month isn't enough to raise a kid?

Or is Kelis just sticking it to Nas because they didn't work out?