Ryan Gosling and Eva Mendes are in a "tug-of-war" over their pre-nuptial agreement. The 'Drive' star is reportedly embroiled in a battle over how to split their fortunes if they ever called it quits on their relationship. A source told US' OK! magazine: "It's just business, but it's a real tug-of-war - she has more money than he does. "Ryan just wants 50/50 all the way, end of story, but it's not as simple as that." Friends of the pair believe Ryan is using the prenup as a delaying tactic to avoid tying the knot with the star.