No high horse intended, I simply made comments in light of your initial posts that you needed to put the money down and how substantial the cost was. After all you did say "I don't want to affect his pension BUT at the same time I have to put it down on my GP renewal form. It's an outgoing (substantial to me) and it could be the deciding factor on whether my family get our GP visit card renewed. "
The bolded words suggested to me on my reading that you might contemplate impacting the pension, how else can one interpret the “BUT” in your post?
Your most recent post gives a completely different sense and perspective stating "My mom would prefer not to take any money off me but I insist on paying her because it is the right thing to do." That puts a completely different flavour on it and suggests a much more voluntary nature, and your choice to remunerate your mum, which of course I admire as the right thing to do. Your earlier post inferred that you needed to put the cost down and the use of the words substantial and deciding factor did not bring the true meaning of your position across.
If I offended I apologise, it was certainly not the intention, but it did appear to me that you were prepared to contemplate impacting the pension because of the key need to have your GP card, etc. With your additional posting it is clear that this was never on your mind.