We (sadly) live with my girlfriends mom because her health isn't great. She needed extra help. But without telling me, her mom stopped contributing to rent. Rent is $1000. Utilities is 400$ roughly depending on season. I pay all the utilities. I used to pay for her mom's cell phone too when she was contributing but I cut her off (AITA for that??). All said and done I was paying over $600/mo for cell phone, electric, and internet. It was fine but now her mom is no longer contributing towards rent and only pays for "food" but she mostly shops for herself and no one else.. so that isn't even a fair contribution.   


Basically, my girlfriend is paying $1000 rent and I'm paying utilities. $150 for internet, $200 for electric, and $150 for cells. I cut her mom off my cell plan so my girlfriend pays for her moms phone while I pay for my girlfriends phone (lol).  


Should I be offering more money? I have plenty of money saved. I sometimes feel bad but at the same time her mom is a full grown adult who is capable of helping out. If she weren't it'd be a different story. Two years ago she flipped out on me when I bought hamburger meat because I bought cheap stuff (I only had $10 on me, was broke). I used my last dollars to get hamburger meat so she could get food that I didn't even like. She flipped out and said I was an asshole for buying cheap meat.  


I'm planning on moving far away this summer. I just feel bad my girlfriend is getting screwed but she isn't really saying anything. AITA?