I recently changed my role and am fortunate to earn a good salary. My sister works in nhs and i now earn c. 3x more than she does. We are both single parents but I have 1 child, she has 4. Whenever our mum asks what I've been doing, where I'm going on holiday, she makes comments about what a shame it is that my sister can't afford to do the same and how I should remember not everyone is so fortunate. I treat my sister and her children, paying for days out, meals etc and flights for her and her eldest to go to Venice. I always feel guilty after speaking to my mum and feel I should give more to my sister (despite her being v proud and would never accept direct money as I've offered before and she's declined, thus treating when I can). Aibu by not trying to do more?