No no no. I'm sorry love, I'm going to be bossy now. It is not a woman's job to make a home all by herself, keep her DH on an even keel, be responsible for a man's happiness. I'm sure your Mum means well, but no. Remember that as the partner of someone with alcoholism, you did not cause it, you cannot cure it.
It is a parent's job to provide their DC with a safe, peaceful home. Your DH cannot or will not do that, so you must, and you will
.
I remember overhearing my SIL comment to my MIL "Mr Lizzie drinks far too much" and MIL replying "Yes, but it's Lizzie's fault, why doesn't she stop him?" It was awful, and I knew in that moment that the only person who could stop him was him. And I was so angry, if she really thought his addiction could be "fixed" , why hadn't she stopped him years before?
I think it's partly a generational thing, and borne out of fear as well. Other people in whom I confided saw it for what it was, his problem to deal with.