My mom probably does not fit into the hoarder category (Rarely shops), but she DOES have a terrible time throwing things away. And she has more cats then she should have as well. Her house is just awful.
We've all (5 adult kids, local and willing to help) tried to help but she makes it very difficult, she has to have the final say about what gets shredded, donated, kept, shared etc. She is too 'busy' so it piles up. She has stacks and stacks of magazines, junk mail, newspapers, recycleables, etc. She gets VERY upset when someone is there 'helping' her get rid of some things.
She also complains that no one helps her, which pisses me off a little. I have on many many occasions. Used to go once a week, would call the day before to remind her, say have a pile of things ready for her to shred, I will take some garbage with me, I will do whatever she wants me to with the stuff.
Every single time, when I got to her house, week after week, she would say, oh, I didn't realize you were coming today, I've been so BUSY.....Then I would go through some tings, paper by paper, with her approval each one, sigh....
I enjoy her company, she's a loving generous person, an excellent mother, a wonderful grandmother, but we cannot go to her house. It embarrasses her to have us there, and is very uncomfortable for everyone.
So.....I tried to see here somewhere other than there. She lives about 40 minutes away, but she is getting older and rarely wants to drive. So I say I'll come pick her up, bring her here, out to lunch, etc, when I get there she does the same thing, that was TODAY we were doing that? Even though I called her and reminder her the day before. She is never ready.
She is still managing to come to the bigger things, major Holidays and such, but she rarely leaves the house anymore. Used to come over to dinner weekly, used to go swimming at her seniors club, used to go to Church, can't even get her to church anymore, there is always a reason she can't do it.
She's 74 now, have a few minor health problems, but over all is pretty strong and healthy.
You CAN'T let her know it's not ok she lives like that. It's not UP to you how she lives, sigh, sorry. I am just coming to terms with this myself. I hope you can enjoy her, find some common ground, I don't think you will be able to change her.
:(