Firstly, you should kick your girlfriend for not making any efforts
to shed those mega-kilos! Does she has no pride to look better when
now that she has a boyfriend?
When she is done and dumped all her mega-kilo watts of fat
particles from all the right areas, then all your camp mates will
automatically kick themselves when they start to masturbate
to and secretly fantasie about your girlfriend. If you're
lucky, you will get to kick their ass with better reasons!
Kicking your camp mates and picking a fight with people when you
are on the disadvantage side, will only end up bringing you with
more pain and anguish even if you managed to win all the
fights.
She's fat, and it's a problem with our current society, so fix
her fat-ness and you won't have a problem or try to maintain your
mental balance by convincing yourself "She's fat, so what?" when
you are cornered. 
Go watch "Shallow Hal", Jack Black was attracted to Gwyneth
Paltrow not because he knew she was fat. Either there's something
going on with your relationship or you just have a strong fetish
for big woman.
You won't be so affected and concerned by your camp mates if you
really can accept your girlfriend even though she is fat.
I don't know if you're just being sarcastic or what.
There is nothing wrong being fat. There are people out there who
prefer their partners to be fat, and its part of their identity. If
everyone were to be of the same shape and size, don't you think
this society would become very dull instead?
The problem now is TS camp mates who are incapable of
considering other people feelings by criticising TS gf. You would
create a huge ruckus too if someone were to insult someone dear to
you right?