What if there's a symmetric relationship - I.e. our "parent" looks to us like just another black hole that we, not knowing better, would consider a "child" of o

What if there's a symmetric relationship - I.e. our "parent" looks to us like just another black hole that we, not knowing better, would consider a "child" of our universe. Hawking radiation in one is from stuff falling into the black hole from the other. Then everyone is on everyone's balance sheet, and e+mc^2 = constant. Topologically it would look pretty crazy.