Sister and I are both married. One child each. Her household income is much larger than ours (say 8-10k take home a year more). Sister had serious illness which was, thankfully, not life threatening but meant she was unable to work for about 6 months. Her partner was able to carry on working with maybe only a slight drop in income. Partner is the major earner, bringing in about 2/3 of the family income. They have not joined their finances together.
Sister wants our dad to give her money and thinks I'll be OK not getting the same too as these are special circumstances. I said we have had periods with very little income, though this was dry up in our business related and not ill health and dad did not give us money then. She said that's different.
AIBU to think that if dad gives her money he 'should' give me the same too? (I'm not after his money btw, I would never ask him for cash and would never expect him to share what he has earnt). Or am I being a CF for thinking I deserve the same when my sister has been really ill and that affected their income? (they had no illness insurance BTW. Could have afforded it but it's expensive and they decided to enjoy the extra cash instead).
YABU - your dad should help sister our and give her money he doesn't give you. Her situation is unique.
YANBU - 'fairness' is still important and if he gives her cash he should give you the same.