People always fear the unknown. It is not reasonable to cast judgment upon this woman without first knowing the truth. Jesus himself was born with gifts. I don't think it's automatic that all spiritual gifts come from Satan. In fact, I think that is a very weak position to take. The spiritual gifts the demons possess were given to them by God in beginning before they were cast from heaven. They do not come from Satan, he only has the power to deceive. The Father and the Son have known us from the beginning. They know our needs, and sometimes those needs require spiritual gifts. A good example would be the apostles being given the ability to speak in languages they never learned so that everyone present could understand them. A lot of people don't really understand the nature of demon possession, and that gives rise to many superstitious beliefs. Demons come in many forms and strengths, just like people. Some are stronger than others. It true for people as well, some are stronger spiritually than others. It has more to do with our spiritual soul than any inherent physical qualities. The Holy Spirit protects us from spiritual gifts of others who would use them for evil. But Satan and his followers can no longer find their place in heaven. This means they can never know the light of heaven nor enter into it again. But they try and find life through ours. In essence, they try to steal our lives from us. It is not theirs by right and this is why casting out demons is acceptable, but not considered the work he sent us to do. The work he sent us to do is bring others to the body and promote harmony through the spirit of love. That is why he said "though you cast out demons in my name, I know you not." Casting out demons is not credited to us as righteousness. Loving and helping others is. It is best not to dabble in the supernatural because it leaves you open for malevolent spirits to enter in.
To be a part of the body of Christ, and thus a part of his light, protects us. Having spiritual gifts in itself is not evil, it's how they are used that makes the person or entity evil. It's something that this woman should be taught. Bring her to the body of Christ so that she may find a purpose for her gifts that brings harmony to the spirit. She should use her gift to help others out of love. This is the message I was bid to give you.