Tree small baby swallows

This picture is taken under the roof of a petrol station. Under this roof there were about 8 bird's nests with swallows. At first I thought there were 2 baby birds, but suddenly nr 3 showed his/hers presence.
Even though there came cars to fill the petrol tank the parents came to feed the small ones. It was really nice to observe them and I can imagine it is very tight in the nest. Maybe time to move out?