Long story short, DH went out tonight to have a drink with his adult son. I dropped him off just after 6pm, telling him I would be back to pick him up at 9pm.
Five to nine comes and I message to say that I'm outside when he's ready. He didn't appear so I rung him, each time it went straight to voicemail so I text a couple more times.
After 45 minutes he called and said he had been expecting me to call him. He spent the journey home asking why I hadn't simply come in the pub "for a coke" and berating me for making a fuss about him seeing his children 
I've been so furious I've said very little (as I didn't actually trust myself to speak) but I did tell him it was hugely disrespectful. He maintains I should have gone in and found him.
On the face of it I'm now not sure if sitting in the car getting more and more irate was pointless and I was a bit of a twat?
I don't think I'm BU to be angry that he was late, I'm just not sure if IWBU by not simply going in to meet him?