Am I Wrong?

So my ex-wife wanted to keep the kids a little longer Friday night for a Halloween event at their school on my weekend. I said it was fine. No problem at all. I recently moved 25 minutes away. She asked me to pick up the kids at her house at 7:45pm after the event. I said, could we just meet half way, since I didn't want to drive all the way to her house and back that late at night. She said she wasn't going to do that and that I should pick them up and she shouldn't be inconvenience for my move. I ended up putting my foot down and saying no, I was not to drive all the way to her house to pick up the kids. She ended up meeting me at the half way point after 2 hours of saying how I'm not a decent person and I'm an asshole. The half way point is 10 minutes out of her way. Am I in the wrong here? Because I feel like meeting me at a half way point when you take the kids on my weekend is not that big of a deal.