Last year Blac Chyna took rapper Tyga to family court demanding a change in their informal child custody agreement, seeking joint custody and a child support order for their 11-year-old son [click here if you missed that].
A formal custody agreement was hammered out, that didn't actually change the custody arrangement much, but now Chyna wants Tyga sanctioned by the courts because he's refusing to turn over his financial information to establish a child support order...