Brooding pigeon

We have a cherry tree right next to our house, less than a metre away (so the branches touch the house at the end of every year and need to be cut year after year).
This year a pigeon pair decided to build a nest in that tree. Quite wobbly and thin, but for them it seems to be good enough.
So now they sit in the nest, brooding it seems. Sometimes it looks like both our away, but I think that's just what it looks.
Actually it is quite funny, because the path around the house goes straight under the nest, with the bird looking the metre down to us and us looking up :)
I hope I will be able to blip the little ones later. We have some predators here, so fingers/talons crossed.

Edit 2 July: the nest is completely empty now, whether the pigeon ever had eggs is not visible