Jennifer Lopez’s love may not cost a thing, but the mansion she bought with ex-husband Ben Affleck cost her a hefty price. Now she can’t get rid of it. Ben Affleck and Jennifer Lopez were swept into a two-decade whirlwind — two rings, one lavish wedding. Some saw their reunion as a second shot or a slow-motion mistake, depending on who was watching. They don’t share children, and the divorce is finalized, but one tie still remains — sort of. Je…