cat is mean to other people, and sometimes to me!

I just dont know what to do.. She hisses, and attacks my husband, my grandma and rarely me.. but i have noticed lately, she was sleeping with me every night, but just recently stoped. i think that is when all this started. I think maybe she doesnt get enough love from me and thats when she lashes out... Could that be possible? since then i have been trying to give her more attention.. also we have 2 other cats <They are all brothers and sisters> and i think maybe she gets jellous? Please give me your opinions! I want her to be the same good girl she was!

See the vet to make sure she is not having a medical problem that is causing her pain or irritation. Once you have a clean bill of health, you can begin looking at other possible causes. Has anything changed around the house? New residents? Has anybody moved out? etc. etc.

My oldest cat is this way. She is so beautiful, such a glossy black and white coat, that everybody wants to pet her. But if they don't watch it ... YOWCH! lol They get the bite of a lifetime.

How old is she? Is she spayed?