So to give the background my half brother is 8 and has been staying with my paternal grandparents up in Scotland for his half term.

He is stopping off at my dad's on my birthday (coincidentally, not planned) before going back to his mother.

Now onto the dilemma. I've heard nothing from either of my parents about plans to do anything on my birthday for the past month or so, so I made plans to go out to London with a group of friends in the afternoon/night.

Fast forward to Monday and I phone both of them asking if there were any plans at all on my birthday and that I can't do the afternoon or evening because of the plans I had already made. To which I then get told by my dad he wants me to get the train up to visit on my birthday and no longer go into London or to come up early in the morning and then go to London later.

For the 3 leg train journey it would be roughly 6 hours in total going from my home to dad's to London and my dad is not the greatest with kids and I know he will mostly avoid my brother and leave me to entertain him which I would be happy with any other day of the year. I would also miss out on a significant portion of my plans in London as they're time sensitive.

He also just phoned me to say how he never really asks for anything but it would mean a lot to him if I changed my plans to come up to see them, bearing in mind he's had very little to no contact with my brother since he got divorced from the boys mother (his choice).

So question is WIBTA for refusing to go and sticking with my original plan to go out with my friends?