Gma Overreacting

I'm sorry this is just a rant but I'm very annoyed right now. I currently live with my grandparents, and yesterday, I was grounded because I didn't wake up when I was told to. I went to work and on my way home I called my mom to ask if she made any food so I wouldn't have to stop anywhere to get some and she said no, but she told me she was going to the store later and she'd buy me some. so I go home and later my mom shows up to the house and I go with her to the store. when I got home my grandma got mad at me for leaving with my mom because she said I was grounded. like it was with my mom??? today she says I'm still grounded because I didn't ask her if I could go to the store with my mom. truth be told I didn't ask if I could go because it was pouring outside and my grandma was in the garage which isn't connected to my house. I agree that I should have ask but I still think it's insane that I'm being punished for that. I'm 19 and yes her house her rules but this is ridiculous!! 

Vote below to see results!