DS18 has been asked to a friend'a for a two-night sleepover. He was originally meant to be working on one of the nights so would only go for one and told friend so.
He has since left that job so has decided to join us and his sisters for a weekend away instead. Friend is now upset that DS isn't joining for the second night, even though he didn't say he was going in the first place.
I have told him it's his choice, but DS BU in saying that he won't go for both now he is 'free'?