Pure speculation here... it wouldn't surprise me if she knew what she was involved in but said.... just don't tell me, otherwise I'm implicated. Not realizing that she could under worst case be convicted of drug trafficking.
Something along those lines.
If you were the BF, who I'm assuming cannot be prosecuted because he wasn't in the country selling/buying, wouldn't you then say from your position of relative safety, look she had no knowledge of what was in the package.
I mean this is Disney levels of evil, on the part of a two-bit drug-dealer.
If you really want to make money in the drug business, you get into pharmacracy.
The war on drugs has always been a war on open competition in drugs.