How can I give my mother €2000 per month with as few taxes as possible?

First of all: I have an appointment with a tax advisor in 2 weeks, but I wanted to do some research beforehand and ask you, dear financial experts. Context: I earn quite well (currently around €15K net per month) and it also looks like my job is pretty secure. I have fixed costs of around €4K per month and I invest the rest in ETFs or treat myself to something for my hobbies. Now I would like to give my mother (58) €2K every month so that she no longer has to work. She is currently