LOL, Patty! You win the YLF funny girl award! With Claire giving you a run for your money.
Angie's so smart. I was scratching my head wondering why you'd want to try this, Una, when you know it's not really you and it isn't an easy fit for your body type in the first place.
BUT...having said that, KL has a seriously smart point. I have a grey cord button down that I use exclusively as a layering alternative to a cardi on weekends, and it is GREAT in the winter. Cozy yet a bit more structured than a cardi. And a little bit RATE. I can see how a denim shirt or even the right white button down could be used the same way and would really work for you. You'd basically be wearing like a jacket. I don't know if you would like it the way I wear it which is a bit different to KL; I button a couple of middle buttons (to give myself a "waist") leaving the top and very bottom open. I layer it over a thin T and often add a scarf. Skinnies and boots on the bottom. Voila!
You could thrift a white button down and see if that worked. If it did, the very same look would work with pencil skirts & boots. In fact, it could look amazing with your sequined skirt.