Doubt that ..the emphasis seems to be more on the marriage of the Leads , UB and the roadblocks created ...
The emphasis can be on the marriage but the undercurrent can be of how UB's house is brought together. Having a parallel lead would indefinitely shift the focus of the show instead of introducing a twist during the newlywed period. There is plenty of backstory which I think deserves more focus at the moment, in an effort to define the show more.