Unusual behavior!

We are somewhat concerned with our owl family!

The thing is that the owl mother has been sitting on a branch of a tree about 10 meters away from the nest during the past weekend - and still was last night (Monday). She hasn't gone back to the nest as far as I/we have seen. It is very unusual for this kind of owl to be out during the daylight in the first place. So why? No baby owls alive? Too much noice etc for the mother owl to stay in the nest? What's happening in there?

To be continued!