Grandma' s Funeral

Hail ! I' ve got a problem - a few days ago my grandmother has died and in Saturday will be Her funeral. It will be Christian funeral, so I must go to church and I feel bad, because I'm Satanist and last time in church i was many years ago, when I was small child. Will Satan be angry at me ? I'm scared that He will disard me. Please write what You think about it ...