Thanks girls
He will go visit my Mom today, and give her the pressie he bought her, and he will explain to her that he won't be there tomorrow.
I have already told her between nose and lips that he was invited to the concert, and she said," awwww let him go, he will enjoy it". But i want him to tell her himself.
It may sound like i'm making a big deal outta this, but my parents have returned to Holland just 3 months ago, and this is her first BD here, so my son has never been with he's grandma for her BD