Its very common for the mated pair to regroup to claim their box as we have seen in other nest with different mated pairs.
Only days after, Mel & Sydney did the same thing after the Owlceanside Six (6Pac) fledged. They spent time preening each other and even bonding in the nest. but... until I see a egg on the floor, I'm not counting my chickens, or is that Owls?
But hey, we can dream!