Update...
Well, after Monkey trying to make me feel guilty for ages (sqeezing into old kitten bed, then looking at me with puppy eyes), I
finally got round to making him a new one. And as soon as I started, Monkey clearly knew what was going on...
I started by tracing the pattern pieces on paper - and Monkey got straight on the table and sat down on the circle that would be the base for the bed. (I had to carefully cut around him.) Then when I had stitched together the pieces for the lining and showed it to Monkey, he promptly got in it and settled down, even though it was more like a floppy sleeping bag than a bed. And then he stayed there, snoozing, until I was finished with the rest. Once I'd stitched the whole thing together and put it down on the floor, he got in straight away, settled and went back to sleep. I'm telling you - he knew I was making the bed for him. I don't care what people think... he knew.
Anyway, he loves his new bed, and for the past few days had spent most of his time there.
He is such a sweetie, and knows just how to make his mummy happy.