It’s no coincidence that J. Lo’s ”Monster-in-Law” bride-to-be wears a question mark around her neck. ”Her character is very uncertain about where her life is going,” says a New Line rep. Hence the quizzical bauble, made of white gold and — gasp! — cubic zirconia. Certainly less bling than the real-life (and newly hitched) Lopez is used to. ”She doesn’t wear it off the set,” confirms the rep. We should think not.