Check her credit card or bank statement to see if she has purchased it..
Let me ask you this "When you express your concerns, is she soft with you? Is she trying to show you that she loves you very much and shwong empathy? Or does she get defensive?.
I have been clean and sober for almost 25 years now. Most people would say "Wow, really? So you must be cured"..
I'm a pretty simple guy, I love my family , I believe in honesty..