Thank you very much for your reply and your words.

Today we had a little drama, as he realised, we will both leave for noon.
He´ll be picked up today at about 13:00 and than everything will be finde again.

But I talked to some friends who have kids. They told me, that they had the same. Little drama while the parents we´re leaving. After 2 Minutes everything was fine.

Let´s see what he tells us, when we pick him up today.