I have trouble seeing this as a suicide...but, that said, there have been suicides on this site that have seriously shocked many people, due to the life situations of the person. So it makes no sense, really, to rule it out based on how her life appeared, what her immediate plans were, her mood, etc...none of those factors are truly able to determine what is going on inside someone’s mind. Jmo some people would plan especially so that their loved ones wouldn’ t think it was suicide, for their (loved ones) sake.
Am guessing tox results is the primary hold up. I think they can usually determine if the person died from the fire, at least they generally seem to conclude that fairly quickly in other cases. All jmo...