My mum and her husband are arranging a special holiday, and are inviting their children (grown ups) and grandchildren (aged between 2-8). My little family consists of my fiancé, my dd and my step son (aged 17). They are inviting everyone apart from my step son, as they say he will be old enough to fend for himself for the week, and he isn’t a part of their family as such. I find this very hurtful and so does my fiancé (his father). They don’t understand why I expected him to be automatically invited, and I don’t understand why they wouldn’t realise he is my family, and I love him to bits. They actually seemed annoyed at me for questioning this. He is a good kid, and has been through a lot, but both him and his dad haven’t always got along with my Mum and stepdad, but I don’t understand how they can think it’s ok to just leave out one member of the family....so, am I the one being unreasonable to expect him to be invited??