YANBU of course its mean, staggered how anyone could think it not!
However, the older generation, some of them do have different attitudes to money. She views money in a very different way to you op and you will feel better if you can simply start to understand this, to you its to give to your children, ( as you would), give them a wonderful little treat on their bday ( with a SIGNED CHEQUE for more than 15 - IF YOU CAN AFFORD IT) ETC etc.
I certainly hope to be able to give more to my DD than 15 cheque, but if thats all I could afford I would tell them so ....and I am sure they wouldn't mind. They would understand my financial circs...
I know quite a few wealthy people and they have totally different perceptions of no money, to me, is, no money, that doesn't mean lots of assets that could be quickly sold, or a huge pile of savings that you ban yourself from touching.
In fact the people I know who are well off, are in fact the ones who stress about money and lack of it the most.
In fact one sat in her muti million pound house, + other assests, talking about an even more wealthy friend and said sadly " Yes well she doesnt have to worry about money like we do". Amd YES I do know she owns the house with no mortgage and several other properties owned out right, and yet prides herself on her amazing economy.
anyway, i feel for your DH and unless she is sending him a statement of her affection or lack of it - she just view it differently and of course older generation, she may think 15 is worth lots more.