tell her the truth man.....Sit her down and tell her the truth and say that you know she would't approve but that you don't want there to be secrets between you...
She will respect you for it and this way you makes sure that she doesn't suddenly finds out and gets really mad...
In my expirience, parents dislike lying much more than they dislike cannabis
Chillum:
A chillum is a conical pipe made out of clay, a cow's horn, or glass. Chillums are used as ritual pipes by
Sadhus in India to imbibe
charas. Also, they have recently been used by
Rastas in reasoning sessions and grounations. It is a very social form of smoking as a chillum is generally far too strong to be smoked alone. The whole operation of preparing the mix and smoking the herb,
ganja, or
charas is something of a ritual. The
Hindu god,
Shiva is invoked with the
ceremony and the smoker considers the spirit of Shiva to enter him with the act of smoking.
Rastas believe ritual smoking purges body and mind of impurities, thereby facilitating meditation.
(Wikipedia is your friend;-))