Is my dear wife engaging in witchcraft?

For the last two years, my wife has been acting strange and I just don't know what to make of this. Sometimes I wake up in the middle of the night to find her seated on the floor saying strange things in low tones and a time or two she became hysterical and started rolling on the floor.

Other times she wakes up early and I find her sprinkling things around the house and when I ask what this is all about, she says that she usually prays at night and that the things she sprinkles around are meant to anoint our house and get rid of evil spirits.