Indeed, pollyparrot, but what they think is "best" at the time can often backfire.
My Mil gave my husband's sister her inheritance early to buy a big house and live the life of Riley. Mil's purse was always open to pay for everything my Sil's family wanted, but not once did our family receive a penny. Lo and behold, Sil's marriage broke up, all the money had disappeared and Mil is now destitute having given everything to the one offspring. My husband was surprisingly calm and philosophical about never seeing his inheritance, knowing his sister was always favoured over him, but he nearly died on the floor when recently his mother turned to him for a contribution towards her nursing home costs! He had to spell it out to her word for word, but she still won't have a word said against his sister.
Now there is nothing but animosity, bad feeling and resentment within the family, and it is Mil herself who is responsible for the rift which cannot be healed.