Mel Gibson: Baby Mama Gunning for Epic Payday

Mel Gibson clearly loves his little daughter, but he's gotta be regretting hooking up with the kid's mom, who's going back to court for a bloody fortune.

Sources familiar with the case tell TMZ, Oksana Grigorieva is asking the family law judge to increase her child support from $20k a month to well over $100,000 a month.

Our sources say Oksana wants significantly more than $10k a month just for security, even though we're told she can't point to any security risk involving 6-year-old Lucia.

The case is about to go to trial, with Oksana claiming she needs to support a lifestyle of vacations, travel, lodging and other items that make Mel look like mobile home material.