Can I set the x-position of columns in a text flow?

I am trying to create a multi-column textflow that runs across the fold in the middle of a page spread. On other side of the fold the columns should be spaced as usual, but the spacing between columns across the fold needs to be wider so the text doesn't disappear in the fold. If possible I would like to do this with a single container - can anyone tell me if this is possible, and if so, how to do it?

Thanks!