Magic Forums

I need advice. I'm seventeen. I've been studying wicca for a while now. So, while I was tending to my alter, my mother walked in. She freaked out and started yelling, thinking I was doing something satanic. I tried to explain to her the fundamentals of my beliefs, like nature is sacred, honor gods and goddesses, and so on. but, shes so simple minded, and not even open to philosophical theories, spiritual altitudes, or the ideology of other religions. She'll never see paganism, wicca, or anything in that range. How can I practice without feeling guilty about disobeying her?