Should I snitch on my sister for drinking alcohol underage?

Yesterday my parents caught me drinking vodka, myself and my sister drunk it because we were bored with this covird lockdown thing.
my parents didn't see my sister drinking so she got away with it, my parents are VERY anti alcohol so now i am being punished, i am confined to my bedroom and am not allowed out until further notice to make things worse while i was drunk i swore at my mum and refused to stay in my room, so they LOCKED my bedroom door, my parents have said i MUST serve a minimum of 4 days imprionment and then my punishment will be reviewed.
My sister has got off scot free do you think i shouls snitch on her or should i just accept my punishment?
Updates
+1 y
yesterday i tried to blackmail my sister i told her that unless she gave me her phone and unlocked my bedroom door i would snitch on her, then confessed to my parents that she drunk vodka as well and that i was trying to blackmail her, my parents said as she owned up she would recive a very light punishment, as for me my parents went mad and said blacmail is unacceptable and is even a crime, i have now been given another 2 days imprisonment as punishment for trying blackmail my sister
IS FAIR?
Should I snitch on my sister for drinking alcohol underage?
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