I don't think so, I believe these are your fond memories of your cat and you are giving yourself an opportunity to be with him again. I'm not sure why you summoned him in your first lucid, but it is possible that he appeared in your second simply because he had done so in the first and you remembered it while dreaming. I had the same thing happen with my childhood dog last year, two years after she died. I successfully turned her into a dreamsign, spent some time properly saying goodbye to her, and then had the best lucid of my life. I'd suggest you use the opportunity to spend some more time with your kitty and just enjoy

Everyone interprets LDs differently, I personally think that it is your brain accessing memories and nothing more. Just as you dream of the living. But, to each his own!
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