How rude for a mother to be like that with her daughter!!
I think she is trying to live her life through you and may have had problems herself in the past.
I bet she dyes her hair , uses a tanning salon or gets false tans, has fake eye lashes and nails? don't get me wrong I am not judging in a nasty way just trying to show you that maybe she will never be happy with anyone's looks. Size 8 to 9 uk sizes is NEVER fat.
In life if we all looked the same wouldn't life be boring !! imagine every woman with blonde hair, blue eyes, fake nails, fake lashes, stick thin!!!!!! oh my god that would be like living in a cyber world.
Every woman in beautiful in her own right and I am sure men would think the same way.
Can you imagine us going out and hopefully finding a guy to date and they ALL LOOKED THE SAME !!! that would be just plain mad, so you get my meaning?