I’d been cycling with the brake on
... how?
With great difficulty!
The brake pad was stuck against the wheel and I thought it was just my body giving up on me. But you must admit it shows great strength of character🤣
As for Lily and her lack of confidence, I recommend a Triplet. You in front, the cat in the middle and Lily at the rear.

That's a great idea! I'll see if I can have a tricycle built that suits us.
I once went up to Cuicocha lake. It's an 800m climb over 10km. My friends were in better shape than I, it was during the pandemic and they had been cycling a lot, and I was a little busy saving the world. But the difference in speed and lightfoodedness was just a little too much. Almost up, like 1km away from the highest point, I noticed that I had almost lost all the air in the rear wheel. After fixing that, suddenly everything was so much easier... But I was already super tired. But the 10min high speed down the hill was worth it :-)
Thing is, if the brake is on, the bike won't freewheel down a hill. You have to cycle up and down. It was this that eventually alerted my brother to the brake malfunction.
And for the record, a TRICYCLE is a bike with three wheels.