Well well well
My sister. I stood by her for all those years. I have been there day and night. I even had her in my home. But the last 3 till 4 months it's like the same old story. I got a job and pay for my and her groceries. But she hardly talks to me on skype or whatever. I feel like talking to a wall. I get no answers and yet every fridfay she acts like nothing happened while watching me paying for her and my groceries. This goes on for a while now. Not even a single reply to any of my posts but every friday expecting me to show up. I feel used for my money again. If this is what she wants...sorry *****.You messed with the wrong person...
It definitely sounds like she is comfortable and expecting the assistance that you are giving her. Unfortunately you have to set the boundaries and ensure that she doesn't cross them anymore. Yes, $50 per week is definitely not a large amount, however your sister may need to look at how she is spending that food allowance.
I would recommend having her over for a cup of coffee and just love her, and when I say love her, I mean love her enough to tell her how you feel, and how her habits are affecting your well being. You could also go shopping with her and explain to her that the bulk of that food allowance should be used for staple foods that are cheap and nutritious in value.
You also have to love yourself to be okay with letting her hurt in order for her to understand the boundaries. It seems that the dynamic of your relationship has changed. Instead of a sister-sister relationship, it has become sort of a master-slave relationship since she is expecting you to cover more of the groceries. Unfortunately that dynamic won't go back to sisterly until she starts pulling an equal amount of weight.
Is she not able to make more money on her own? Seems odd. Best of luck Vee.