historical kilt wearing question...

[PiobBear]

A scarf, preferably cashmere, should be wrapped around the neck. A plaid is worn several ways. The fly plaid is worn at the left shoulder; it's a modern adaptation, and wouldn't be "period" for your character (but of course would be for your husband). A day plaid is folded and carried over the shoulder, but wouldn't be worn for evening wear. A full plaid is carefully pleated, wrapped around the body, and fastened at the left shoulder with a brooch; they're virtually impossible to don without the assistance of an experienced ghillie (a Highlander's valet).
Of course, if he was wearing a great kilt, most of the surplus cloth would be brought up behind him and fixed to the left shoulder with a brooch, but that's not separate from his kilt.

Ladies often wear a tartan sash across the body, kind of like a very long scarf. A modern adaptation is a much shorter one over the shoulder, with the end stitched into a rosette.