Oh just tell her to get it.
I was absolutely grounded after my AZ jab for about 3 days - but, and here's the thing - you're not really ill - it's your own immune system kicking in and giving you the symptoms. You're fine but you FEEL awful. And I really did feel absolutely awful.
Since my original post a few hours ago I have booked my 2nd jab for Wednesday next week. I shall get the DVD's ready to load and just spend 48 hours on the sofa.
As my dear old 82 year old mother coined it; "Don't be a clot, get the shot."