I'm not telling my gf where the alcohol she paid for came from. I don't want to see her reaction!
Are you worried she might do something if you tell her where the alcohol came from?
She will chew me out. She is a bitch
She probably just wants to know that it is safe to drink. It is normal that she is questioning you about it.
It's better to keep the peace.
If she finds out where it came from without you telling her the peace might get disrupted. It's better to be upfront and get it over with instead of living in constant fear that your partner will find out the truth.