I've never seen so many days of frost as I've seen here. They are now saying we could get......shall I say the nasty four letter word........SNOW!!!
Zada and Azrael wear their sweat shirts during the day and their big blankets are by all three sliders so they can enjoy the sun regardless of what time it is and they relish every warm ray of it.
I would suggest you put little sweaters on her that she can't get off. Keep them on her day and night for a couple of weeks or more (taking them off only to bathe or brush) and she will be used to having them on and will be more comfortable.