Their are four kids in our family. My mom treats me and my oldest sister like we are slaves. My other sister and brother, she praises for cleaning up their own messes. I clean the house she says I missed a spot, looks at me like I'm stupid and does it herself.
When my midle sisters grades come in, my mom tells her what a good job she has done, keeping her grades up. I have to work hard but my grades are as good as hers, when my grades come in the mail it gets looked over and passed on to me. No word said about my good grades. My oldest sister had pictures developed from a few years ago. My mom flipped through the pictures and commented on my middle sisters hair looked how it was soo short, finished looking at the pictures without saying a word about me or my oldest sister who were also in the pictures and handed them back to me saying she needs to get back to her work. Their are other things that she will let my middle sister do that she wouldn't let my older sister or me do.
no, i am sure that she doesn't hate you.
i get the sense, however, that she is expecting something from you with isn't fair for her to ask: she wants you to take a back seat to your siblings. imagine that would be a very hard thing for anyone to do...
i wish that i could give you some sort of magical advice that would fix your problem in one fell swoop, but we both know there is no such answer. the best that i can tell you is that you and your older sister both need to talk to your mother about they way that you feel.
explain it to her. allow her to ask questions, and maybe vent a little if she needs to. don't approach her with a accusatory manner, and don't give her the feeling she is being ganged up on. simply tell her the way that this treatment make the two of you feel, and i bet she will understand. however, just cuz she understands, does not mean that she will then fix the problem in one fell swoop.
if the above doesn't work the only other advice i could give the two of you is to suck it up, and deal with it, and thank the Lord for what you do have, and for the good in your lives rather than the bad. sometimes people are so set in their ways that they cant even comprehend change, and i pray that mother isn't one of them.
anyway, i wish you both the best of luck, and i hope that this helped you, even if only a little.