To want my mum to make more effort

[heatseeker14]

Will try to keep this short.
I have recently started a new job, which means I now only have 2 days off in the week instead of 3. I tend to do most stuff on a Monday, food shopping/ironing/cleaning to set us up for the week. Then if I have a spare few hours on my other day off, I might see my family/friends for a few hrs.

I have arranged to take my aunt out this Thursday and my mum wanted me to cancel it. Back story my aunt can be selfish, so DM says make up an excuse and we can go shopping together instead.
I said no I can't let her down, plus there are things I would like to buy in this particular place anyway. I invited dm but she doesn't like this shop and doesn't want to walk round it with her sister.

So I said I would go and pick her up today instead, after I had done food shopping etc. But when I called at nearly 11am she hadnt been up long and wasn't dressed. She said when her Dh got back from work with the car, she could come over when the kids were home from school, but then didn't come.
I feel let down and fed up of trying to fit everything in. My DM suffers with depression and is on medication, so that is probably why she is being like this.
She also only seems to want us to go to her house. But just popping in at the weekend is never enough, she wants us to stay for hours.
So AIBU?

Oh dear, no YANBU... hard to manage but I think maybe she needs some guidelines. You have a lot going on and need to take care of yourself as well as your family - she should try to either fit in and make life easier for you or understand that if she can't then you may not be able to see her as much.
But I am all talk, easy to say when you're not the one in the situation - it is SO tough!
Is this really the depression though? Or is that just a handy way of getting people to dance to her tune?

She was diagnosed with bipolar disorder years ago, takes medication and has been without major incident for years. About a year ago she found herself getting more depressed, so was prescribed additional medication and up until now has been ok.
I don't know really if this is down to her being depressed, as she wanted me to cancel Thursday and do something with her instead. Also she was going to pop in yesterday eve when her DH was taking his son home, but in the end she didn't. But that could of been down to her DH, as he probably wanted to go straight home afterwards.