Re: sneaking smoking hookah.
Have you smoked in the house before? Have they ever smelled the smoke? I think the thing that they would smell most would be the coals starting up. If they haven't smelt it in the house, I would just try and ask them I could do it once, just to let them see what it's like. It doesn't have any tar, which I think is what stains the walls? But just try and reach an agreement on it. Don't push it too far if they aren't budging though.