There’s a joke about scratching the surface of the fashion industry and finding — more surface.

And as true as that can be in a world of celebrity air kisses and all-too-perfectly imperfect Instagram posts, there is plenty underneath in fashion. It’s just not always pretty.

Proving that again is the knockdown-drag out fight between Net-a-porter founder Natalie Massenet and her romantic partner of 14 years, Erik Torstensson , cofounder and creative director of the denim brand Frame.

The power couple went from all smiles at all the fashionable parties to slinging lawsuits back and forth.

It is an instance of love, family and big money mixing very uneasily. And the stakes are high.

First and foremost, the former couple are fighting over custody of their 7-year-old son. Then, accord

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