@XSugarplum,
One universe is enough to bring about that question.
When I look at a flower, there are two parallel realities:
1) the flower;
2) the image of the flower in my mind.
No mystery, right? Now if the flower disappears but the image remains, does it mean there is a "parallel" flower?
Two parallel realities is the most common mode of our lives. Sometimes our spirit takes a leave from the body it is in charge of, as it happens in dreams, and has some adventures.
Spirit is not less real than matter. We should be absorbed more seriously with the question where our spirit shall go after the body is gone, rather than playing useless tricks with it.