Like I said, Zara don't do maternity wear ... I personally don't mind showing a bit of bare stomach either, so a waistcoat with a satin skirt will be my go-to when it gets warmer.
Like the vest, the knit waistcoat is now a classic you can tie ... with bejewelled buttons (a mini trend of its own) and Zara was quick to follow. So how do you wear the knitted vest?