This looks like a combination of badly ripped off Monse and this Altuzarra getup that Rosie Huntington-Whiteley wore. Neither of those are SUPER reference points. But Diane is a new mother, and this top certainly seems invested in pumping her right breast for her, so MAYBE she’s just beta-testing some lactation fashion and we’ll hear all about it in a few months. Listen, it’s 2019: Anything is possible. This could be useful!