My own sibling stole my ID to buy drugs

I had a similar experience with my sister when I was 13 and she was 16. She came into my room one day and asked me if I could offer her some money from my allowance, so I had asked her "how much does she need?" and she said something along the lines of $5.00, or something, (the exact amount she stated has been lost to time) so I said "Okay, I'll lend you that amount," after that, I lent her the amount she asked me for and she told me she'd pay me back, but she never did and it never occurred to me to ask her what she needed the money for, nor did she say, but later on, I suspected that it was probably to buy a pack of cigarettes.