Some folks are like that. She possibly reckons that this shows that she cares for you/is caring - she may be she may not be, I don't know.
I see it as demonstrating love by crippling, or trying to cripple.
Maybe similar stuff was done to her as a kid.
End of psychological musings.
Suggest in future you respond with a "bless you" and a wheelie.
From the little she's said to me, I think she was
definitely 'crippled' as a child by dire warnings about the risks of almost
everything.
She 'warned' me about a short and dangerous bit of road nearby (of which I was well aware) and I said to her don't worry, I ride on the pavement there. (Obviously when there aren't any peds there - but there never are, it's a horrible bit of road which just goes to a big junction). 'Oh!' she said 'but that's against the law, what if the police see you?'
I said the police have already seen me and they gave me a grin and a thumbs up.
'What if the next ones you see there stop you?'
Well I said, I'd far rather be stopped by the police and taken to the police station for breaking what is the letter of the law, than be stopped by an HGV and taken to the mortuary for abiding by it ...
She had no answer for that.
She's away this weekend and I'm cutting down some of the overgrown shrubs in her garden for her - I won't do it while she's around or I'd whack her with them! 'Watch that branch its got a thorn on it' 'Be careful of that leaf - it might land on your toe'. Before I got the measure of her, I told her there were a few nettles at the base of her hedge and she went wild, putting on big gauntlets and ripping them out. I only told her because I was going to ask if she wanted some of my left-over daffs to plant at the base of her hedge ... LOL!
Yet all during last year's lockdowns, while I had to self-isolate before and between my several surgeries, she faithfully and reliably did my shopping for me, so I put up with her foibles ...