Dream interpretation is actually a very ambiguous thing, just like this dream of yours. If I say that your relative is sick and can't drink, and you dream that he drinks, do you expect this relative to drink with illness until his illness becomes more serious? At the same time, I can also say that your relative is sick and can't drink. You dream that he drinks, which means you expect this relative to recover and become able to drink.
This is the interpretation of two completely different dreams. As long as others choose one to tell you, whether you believe it or not, you will feel guilty or gratified accordingly. Dream interpretation is just a series of psychological hints instilled by the dream interpreter.
I just want to say that this is just a very ordinary dream, so I don't need to care too much. If you like some positive energy, you might as well use the latter to interpret dreams. You hope this relative can recover soon and have a good drink like ordinary people!