Dear Auburn:

I have read your mail already and feel very bad.

I think that this problem might not occur from your mother. But it might occur from she was left in the past. Why do not you look back and find the reason on why does she spend most of her time on Computer. I might occur from she used to have nothing to do in the past. If she was left in the past, you should spend your time to try to talk with her. But, if she has nothing to do. Why do not you find something for her? I think you should spend more time to your mother. However, if she still want to spend her time on computer. You should find some work and give it to her to do. For example, selling thing on the internet or making the website etc. So, you can manage her time for playing the computer.
By the way, I really do not know that does your mother have any social problems with other people? Because if she has any problems with other people, it will make your mother does not want to be the volunteer or joy any club activities.
Lastly, I think that you should spend more your time to talk and take care her. You might manage your mother’s time and tell her what she should do softly. Moreover, you should try to help her reduce smoking the cigarette. But, do not do it immediately. And please do not give up helping her even though she will berate you for attacking her. Try to do your best. I think that everything will be OK soon.

Hope you can do it.
Ann