I think there's a pic of Mum next to the dictionary definition of 'weird'. My sister and I 'politely' refer to her as 'difficult'. Do love her, though...
I have many examples of Mum's behaviour, but here's one which is quite illuminating, I feel:
When I was 21, I lived with my first BF (who later became my ExH). She wouldn't speak to me for 18 months because she didn't approve. She would turn the other way in the street if she saw me coming along. She walked into a glass door once doing this 
.
I found out years later she was writing nasty letters about me behind my back to other members of the family. All lies. She was just bitter because, for the first time in her life, she didn't control my every move. My exH took that role on, unfortunately!
When I married my husband, she came round to the idea and attended the wedding.
When he started getting violent, I mentioned it to her, telling her I was seriously thinking about leaving. She told me (despite being divorced herself in her her 40s) that "it can be pretty lonely out there on your own". I was all of twenty-four!!!!
She also said "I hope you're not expecting your father to tackle ExH. He isn't well enough you know". No offer to help or anything, despite having a three-bedroomed flat with just her living there. I'd have paid my way.
So I make arrangements to leave with the help of friends moving my stuff out in their car when exH was at work. Through work, I got some cheap accommodation on a temporary basis that was going spare.
She came to visit me at my new address. Her first words were, "So who's the other man then?!" There was no other man, though that was hardly the point.
She became my exH's best friend for a while during our break-up. Kept going round to see him though she'd never done that before. Felt sorry for him and tell me I should be too!
She also gave him my new address, despite being asked not to and being told he could be violent.
At the time, I didn't even think any of this was that weird. Can you believe that?! But then I'd had a lifetime of conditioning.
I haven't a clue what's wrong with the woman, but I think narcissist could be one of the diagnoses.
The not doing much with my life thing quite likely arises from all this fuckedupness.....