Does no-fault mean that a man can squander the marital estate on his girlfriend and just get away with it?

Not at all. Squandering the marital estate on a girlfriend is called dissipation, and courts look with great disfavor on it. It’s that adultery that comes with the girlfriend that does not carry as much weight as it once did. This is where judicial discretion comes in. Conduct during the marriage is a factor, particularly and most commonly when one spouse steals or misappropriates what rightfully belongs to both of them.