<human>: Can you provide a brief overview of the text?

So, a little back story on us. My gf's mom doesn't work, and just literally stays at home most everyday. Her dad works a pretty good job, and is the only source of income for that house. My gf thinks she's entitled to that sort of living. Not necessarily staying at home all day, but she wants whoever she's with to take care of her financially. And we live in Miami, so she has an expensive taste.

On the other hand, my brother and I were raised by a single mom who busted her ass everyday to provide for us all. She's says taught me to be smart with my money and save as much as possible.

I'm barely making enough money to cover my bills and have a some money left over for play (which I usually spend on her, or on something for us to do together), while she works, makes more than me, but is still struggling as much as I am.

She's had rich boyfriends who pay for everything and spoil her financially, but I: one, can't do that right now. And two, don't feel like I should do that even if I could.

Don't get me wrong, I have no problem spending money on her. I buy her things and take her out when I can, but I feel like it should be a mutual thing. She doesn't really spend much on me unless she really wants to go out to eat and I'm too tight to do it, which isn't often. She doesn't ever buy me things. She cooks a lot for me, which is great! But I usually split the groceries with her. 

I feel like a relationship is 50/50 in everything, but I'm fine with it being 60/40 financially if she's doing other things for me to make up for it.

Is she just being spoiled and expecting too much? Or am I in the wrong, and I should be fine with spending tons of money in getting her what she wants to make her happy?
<bot>: girlfriend expects me to spend so much money on her and her wants, but won't return the favor. Should I cater to her expensive taste, or put my foot down and expect equal treatment?