Drunk Again

Once a week I take my father to a diner and every time, he gets wasted on wine. I tell him just to have one glass because I don't want him to fall and each time we go he either gets another one while I am in the restroom or orders another one and sheepishly apologizes to me at the same time. This results in an extremely embarrassing situation for me when we leave the diner and he is clinging to me. I used to be able to drop him off at the home and now I have to walk all the way to his room with this CRABBY man grabbing my arm telling me I am going too fast/ too slow, practically falling over. Shouting at other residents, and being more of an a-hole than usual. 

My sister decided to bring him to the diner once a week also when she found out he could provide her with money after I took over my mother's finances and cut her off. I feel badly for her in that she works full time- but if she wants the money she has to pay the price.