Modal ontological argument

[Jehanne]

True, but, if the Universe's volume is finite at the beginning, then, it will remain so forever.  As such, distances on intergalactic scales are increasing, and, hence, so is its volume.

#1 It may finite, but it may not. In the latter case your point is moot
#2 Its expanding into nothing, meaning its just expanding. There is nothing it is expanding into.

When you blow up a balloon, the surface (rubber) just expands. It does not expand into any other surface, like space is not expanding into any space "external" to the universe.

This is the point that I was trying to make to Klorophyll -- the Universe is expanding into nothing.