Be generous and resepectful to your parent and siblings by taking the hard decision and absorbing whatever upset follows. It might be a substantial sacrifice to let your parent be angry with you, but an exemplary person would respectfully accept the difficulty in order to secure proper care for their parent. Be respectful of your parent’s authority and don’t intervene and try to take the decision away from them. Instead be generous in helping provide for your parent while your parent makes their own decision
The ethics of Confucianism more relies on the legitimacy (mingfen). Because with mingfen, the action will be legimacy. Therefore, with the mingfen of xiao (filial piety), the intervene from Children will be intervene.