<human>: About 7 or so years ago, I went to the animal shelter with my mother and brother to pick out a new kitten.  There were two there.  One, an orange cat, was incredibly loud and scratchy.  The other, a black cat, was more calm.  My brother wanted the orange cat, but I did not on account of it being scratchy and meowing a lot.  So, we ended up getting the black cat.

Flash forward 7 years.  The black cat (we named her Emmy) is incredibly skittish, not a friendly cat at all. We hardly ever see her.  Recently I smelled a terrible smell in my room.  It turns out, Emmy peed in the vent in my room, and also the vent in another room in my house.  Our whole central air conditioning system had to be cleaned out.

Whenever discussing this, my mom blames me for it.  Saying that I am the one who wanted this cat, that I had to have this cat, that if it wasn't for me wanting this cat we wouldn't be having these issues, how we should have went with the cat my brother wanted, how my brother made a better decision on picking the orange cat, etc.

Today I went to my mom's work and we were talking about puppies we saw on a local shelter's Facebook.  I said how they are cute and my mom mentions yes they are cute, but so bad.  Then her coworker says "Not as bad as your cat, the one you just HAD TO HAVE, MidnightBeggar".  

This has been going on the past few months, and it really aggravates me.   If my brother had picked this cat, it would be no problem, but my mother always seems to pick on me and bring me down about whatever it is she can.  This time, it is our cat.  I have already asked her to please stop blaming it on me, to which she responded "well, it is your fault after all!  who else should I blame it on?" I am really at my wits end on this and am doing everything to not freak out every time she mentions it.  Help!

Can you give me the gist of the text in a nutshell?
<bot>: I picked out a cat 7 years ago that has now peed in the house, my mom blames me and tells everyone