Lovely shade of purple. Suits KM’s colouring very well as there’s not too much of it, and it suits navy very well. The design also really suits her, it gives her bulk and volume but skims in all the right places. Really good choice, and very good decision not to wear it with a skirt - would have made it really matronly.
I agree with PP, KM would suit tailored trousers much, much better than these wide legged trousers. Or just a little less wide legged. I would think this blouse would really shine with pencil pants; slim legged woollen pants; the mythical perfect pair of black/navy trousers. It would make this an outfit suited to a 37yo, rather than something even Catherine Deneuve could pull off.
Finally, I just wish the VB trouser length would stop. Such long hems make the wearer look short, or like Chewbacca, or like their safety pins fell out.
Actually this is the final point: I think KM, with a less ageing haircut, would look phenomenal in a 60s-look capri-pants + boat necked combo, a la Jackie O. She’d need to ditch the long layers and go for a length just below her shoulders, no bounce. She’d look so much more youthful.