Rapper Future's boastful ways may have cost him dear after his ex allegedly heard him bragging about his spending cash on Tv.

Jessica Smith claims the rap star, real name Nayvadius Wilburn, lied about his net worth to a judge during a recent child support spat - and she believes he can afford to pay her more than the $1,662 (£1,000)-a-month he agreed to stump up for their 10-year-old son.

The amount was predicated on his monthly income which he set at $16,516 (£10,300).

But now Smith claims her ex boasted he carries $25,000 (£15,600) cash on him at all times in a Tv chat days after the former couple agreed on the support deal.

According to Tmz.com, she has now filed new documents to invalidate the initial deal and increase his child support obligation.