It was a challenging decision for her to decide whether or not she should choose to be selfish and discard others for the sake of her own comfort or whether or not she should choose to live in this world in a way that would help others.
It was the wolf that removed the first and most crucial concern that she had. This means that there is never going to be a time when the original owner's soul returns to this body, thereby resulting in her nonexistence for the rest of her life.
The guilt she felt because she was occupying the body and life of another person reduced dramatically as a result. As she moved forward in this new direction, Edwin's soul remains were still there to support her in her new venture.