Tia Kemp insists Ross can pay much more than the $1,951 (GBP1,300)-per-month he hands her to help look after their son William, listing his business interests in nine successful Wingstop fast food franchises, his multi-million dollar mansions in Atlanta, Georgia and Florida and his endorsement deals with Luc Belaire Rose sparkling wine and mCig electronic cigarettes.

She believes Ross should pay her $2,800 (GBP1,870)-per-month, so she can put their physically gifted son in the best martial arts classes, insisting young William could be a "star athlete", reports TMZ.com.