NL please I need your sincere advice/suggestion on my story below:

A friend came to me on last week to discuss some issues that has been disturbing her. She attended one of these churches in Lagos for them to conduct deliverance on her cause she does not like the way her life is working like an elephant eating like ant.

As the prayer was going on she started manifesting like a serpent, words coming out of her mouth marveled her, she does not know nor believe that she is that possessed, she said while the deliverance was going on, something was speaking thru her saying “leave me alone, this is my body am dwelling in this body because she is quiet I do not want to hurt anyone that is why I am dwelling in this body, I have been in this body since she was 14 years. Don’t stain my body I am the queen of the coast, leave me alone don’t torch my ring, crown.etc.” that was how the words were coming out until, she was delivered i.e. she was making this movement of removing the crown on her head, every decoration on her head, she removed all the rings in her ten fingers, when she was about removing something from her back she could not, she was screaming until hot prayer was said, she was able to removed what was on her back, she said she does not know what she was trying to remove from her back. After all this she said she was somehow relieved.

She asked me the questions below, I was unable to give her answers, please if there is any deliverance minister or any body that knows something about conducting deliverance in the house, I will love you to help us with answers/advice/suggestions
 She has done deliverance before in a different church with the same manifestation, how did the serpent/queen of the coast come in to her again?
 What would she do to be free from this totally?
 Someone told her that it would be dangerous if the so-called thing leaves her, how true is it?
 Could this be preventing her from receiving blessing from God i.e. can it stop her from being what God has destined her to be?
 Will it be wise to tell her husband? Will he not use it against her in the future?