Lie on side - raise top arm and possibly knee to create cat tent with doona - she may go under and then you can possibly slowly lower the doona down over the lower half of her body.
It might be more effective with a heat source to tempt her in.
Maybe Melbcat is unusually cuddly for a cat though
This is the way. I never met a cat that could resist the call of the "cat tent" and it's emanating warmth. Especially being claustrophiles as they often are.
One cat really didn’t like being confined and would lash out (a neglected runaway I eventually got back to his owner - * the confinement was only gently herding him into a corner to dab on flea and worm treatment, nothing else was forced on him) but with patience he started to spoon with me over the covers on his own. He would allow me to pick him up.
If he’d crashed for longer than a few months I might have built enough trust for the cat tent
I do not like that forecast. I looked at the predications for the next week and the coldest mornings are all the ones I'm working (which means 4am wakeup). Two days -1, one day 0, and a pleasantly warm 2 degrees for the other. There should be an extra penalty rate or allowance for early starts in below zero temperatures.