I heard about this the other day on the radio. It's so dumb, in fact, it's beyond dumb. Here's what I would do in that situation.
In court, as soon as the judge came to the decision that I have to pay some lying whore child support, I'd pull out a gun and shoot myself in the head. Not only would this now take away any money she would be getting but she'd have to live with the fact that someone died because of her selfish and disgusting lie.
Maybe next time she'd think twice before telling such a giant lie.