Would you be annoyed??

Okay...
so my mom and Grandma I really do love but for some reason I feel like they don't make long term commitments to cats.
The last cats my mom had she suddenly became allergic to them (i'm not buying it) when they got old and had medical problems. Some of you may remember Tigger and Cuddles. She was going to put them to sleep because she didn't want them anymore so I took them in, cared for them, and helped them to the bridge when their natural time came.
My Grandma has cats and she was telling my mom the other day she worries where they'll go when she dies. So my mom just automatically volunteers me saying I will take them in.
Even my aunt had a red eared slider turtle that she impulse bought that I ended up taking from her who is still with me to this day.
I'm sorry but I really like my crew how it is right now and I'm just not going to continue taking on their disposables.
My mom just doesn't get it. She thinks because I have 7 ferrets and 3 cats that I just automatically want to take in whatever animal is in need. I told her I would foster and help them find a home but really I like things the way they are right now and I'm at my limit for animals. She just kind of laughed and said "Yeah right, you wouldn't turn it down if it was in front of you".
I am tired of being the grown up here.
Is it just me or is this incredibly annoying??

Yeah. I think it is really something with my mom's side of the family or something. My Grandma even adopted an older dog with medical problems because she wanted to do something nice and then she found out it was more work than she thought, she had him put to sleep. A few weeks later she went out and bought a puppy. Luckily nothing has happened to that puppy yet but I am skeptical.
They all are also the type that think they can walk into the pet store and an employee there will tell them all they need to know and not do any research on their own....yet they will spend thousands of dollars on fancy new gadgets or a weekend trip Like really, how hard is it to look up something online or buy a book or two??
In a way I feel like they're not having to live with their decision if I keep taking on their animals..they can just forget about it and not see about following through on their responsibility.
I can't believe we're even related

Yeah, I know what you mean, Denice.
My mom hasn't gotten any more cats..she seems bonded to her dogs so that is good at least..what irks me is she is of the school of thought a handicapped animal should just be put down. Like if one of them lost vision in one eye or something she'd think it was cruel for them to live. That makes me mad. Handicapped animals can have fantastic lives. It's like as soon as it gets hard she bails. With Tigger she wanted to put him down because the sinus tumor disfigured his face and she thought he'd feel bad about himself. He felt fine about himself, she just didn't want to look at his face like that..
My Grandma has done this with dogs over and over..I fear if the puppy will have an accident..one of the reasons she put that old dog down is because "he took too long to go potty and it's too cold for an old woman like me to stand outside". My Aunt likes things that are cute and an easy sell at the pet store. If an employee tells her she can get everything the animal will ever need for under $50 and she thinks it's cute, she will buy it. At least she knows her budget but she fails to see an animal will need care after you buy it besides food and bedding.
I don't know maybe it is a generational thing. I don't understand it. What really gets me mad is they rationalize it and talk about how it was "the kindest thing to do", they really think they are being great people because "it could have been worse".
I don't measure quality of life on whether it could have been worse or not..I check myself in how I'm providing by asking myself "could they be missing out on a better home if i take them in? would they have everything they ever needed or would someone else do a better job?"
I didn't talk about it much at the time but the whole Tigger and Cuddles thing..I feel like I had to do her dirty work. She is over twenty years older than me..I just don't get it. They don't even stay with the animal when it gets put down because it'd be "too painful". Maybe if they looked into their eyes and stopped feeding themselves all these excuses they would learn.
Sorry, just needed to vent. We have been growing farther apart and this is just another factor in the whole thing. If I say something she cries and plays victim and if I don't then i'm biting my tongue and being utterly frustrated.
I love my Mom, I just don't understand her.