Hi MM! While you may be feeling as if this is a philosophical exploration, the ideas themselves are not connected to reality (at least my reality right now ; ), so I can understand why your T thinks your thoughts are delusional. Forget the term "delusional" for a moment...if i read your post correctly, the thought of your husband or yourself being erased from existence is causing you heavy levels of anxiety? If i were a T, I would note that your level of distress as being enough to warrant concern. Couple your distress level with the ideas that are prompting the distress and that those ideas are not conventionally understood as reality, I think that is where your T derived the idea that you are delusional.

I struggle with philosophical concepts of existence sometimes and I let my mind wander to far off places sometimes the concepts and explanations i come up with make perfect sense at the time, then later i review my ideas and realize they were not necessarily grounded in reality. So, I think I understand your thought process, nonetheless, the ideas you stated are not consistent with reality from my viewpoint and I think your T is just concerned and wants to help you.

Go easy on yourself...(((HUGS)))