Cleaning my sister's house, looking after the children and buying milk tea, is it not too much for me to take 300 yuan?

However, cleaning, babysitting and buying milk tea are all done by ourselves, and we all spend our own money. My sister's child is the only child in my own family. If I buy milk tea for my sister's children, I can forget my love for my nephews and nieces, but cleaning is not what my sister should do for her, so I personally think it is not too much.