Fran3325
I think HousePlantQueen’s half joking reply might be the best way of keeping the peace while (in a rather passive aggressive way) putting my viewpoint over. I don’t think I want to “put them in their place” as my D has been my biggest help and support through loss of my husband.
That's worth a try, I'd say, Fran.
Maybe your SiL doesn't realise how often he says this type of thing and just needs a little hint.
If he doesn't stop, tho, maybe progress to something like "I can actually do this, you know".
Or even "You can just knock that off."
Might you need your hearing aid checked to see if you need a better one, tho?