Kris Humphries is secretly demanding $7 MILLION from Kim Kardashian to walk away from their marriage … TMZ has learned. Sources directly connected to Kris tell TMZ … the bballer — through his Minnesota lawyer — has given Kim an ultimatum … either pay up, or endure an ugly, public trial.Our sources say Kris and his lawyer have been told to pound sand, and with good reason.For starters, even if there wasn’t a prenup, the marriage lasted a grand total of 72 days, so the community property w