'Edge of time' meaning of phrase

What is the meaning of at the edge of time in the following sentence?

At times they spent hours chatting in the office, while the house seemed suspended at the edge of time.


Edge:

  • a line or border at which a surface terminates.

Here edge of time is used in a figurative way to refer to the far end of time suggesting that they were so immersed in their chatting in office that the house appeared to be as something very far away from their reality. The author is probably suggesting that they were so absorbed by their chat that they almost lost touch with they world.