I'm a first time mum and my DFs first grandchild. Firstly my DF booked to go away with his gf and would be out of area on my due date (luckily my DS was born early so DF was actually around). Secondly he's now gone travelling around Asia for a year when DS is only 3 months old.
He's in is mid 60's and I get that this could be his last chance to experience something amazing but I personally wouldn't do it as I would find enjoying my first grandchild much more exciting. When he gets back, DS will be over a year old and won't know who he is.
An I justified in feeling a little upset by this?