Theory 3: Marc found out J-Lo was actually lying when she sang "Love Don't Cost A Thing."
Turns out, J-Lo's love isn't cheap! From the big house the couple now shares in L.A. to all the "Louboutins" J-Lo keeps on her feet, it all adds up. And right now, Marc is reportedly more than $3 million in the hole with the IRS and struggling to keep his bank account in the black. A word of advice, Marc: It's just about always cheaper to keep 'er (those child support checks are no joke!) but we do realize that Jenny From The Block isn't exactly balling on a budget like she used to, either.