I would let her in on every stealth technique I know of. I'd let her know that with a little extra effort, you can cover up the smell, and any traces of intoxication. When you smoke her out, assure her that by the time she got home, she would be sober. Keep her away from home for as long as necessary.

Stealth techniques are a must for her assurance!

Have a lot of fun, I know you're gonna. Don't let her give up if she doesn't get high the first few times either. I've had people give up on me. It's kind of sad. :sadcrying