You could ask her to change it to "offers in the region of [£x]" and then we'll see what happens.
[Then two sentences where I explained how to make tax payment by providing a link - gently pushing the task back to her. I am not making the payment for her; she has to learn!]
OK glad you've moved stuff to [brother's] and that you won't be feeling as lonely - I can see how important it is for you to stop feeling that way [slight validation]. I can drop in to check things on some Friday evenings."
[so not committing saying I will always come to the house twice a week for example, just when it suits me. I am busy and GALing after all!].
I think that was fine as a response.
Me - 36, W - 32 No kids T - 8 yr, M - 3 yr Discovery - 14 May 2019 S - 25 May 2019 & D bomb - 29 July 2019 D & House sale final - Feb 2020