I'm thinking that I'm expecting my dad to pay for our family vacation.
Why do you expect your dad to pay for vacation?
Because I am his son and my mom is his wife and she's my mom and they will support me
It's ungrateful to expect your parents to pay for things. You should work to get some financial independence. It will be better if you want to do something and you'll be able to pay for it yourself.
It's normal to take vacation, I'm going to talk to my dad and tell him how I feel.
I just don't think you should ask him to pay is all. When we become adults we're expected to pay for our own vacations.