The lease on my car ended before we had managed to sort the new one, resulting in me being without a car for around 3 weeks. I have been able to manage for about 95% of the time, but I have 3 DC, I work in another town and some days I would have really struggled to get where I need to be.
Because of this, my ex husband, who I get along totally fine with, share custody with etc, said that he had a car that I could borrow for a couple of days, no problem. Nothing fancy, a bit of an old banger in fact that he absolutely hates, but you know what, it got me from A to B and I was very grateful I could get to work easily. So I borrowed it for 2 days last week, and again 2 days this week.
However last night, suddenly realised that the car seat for youngest DC was in borrowed car, and my DH needed it in his car for dropping off st childcare. No problem I think - I'm washing the pots, but say to DH could you please grab the car seat before I forget and put it in your car, otherwise we'll be doing it at 6:30 tomorrow morning.
He replies, 'no, I'm not having anything to do with that car' 
Thinking he is joking and I just haven't got it, I laugh, carry on cleaning up and only realise about 15 minutes later that he's not done the car seat switch.
I asked him if he was being serious, he said yes, so I went out and did it. Came back in, DH asked if I'm pissed off. I've been accused (and guilty) in the past of saying everything is 'fine', so I said actually yes I am a bit pissed off, I think you're being juvenile, leaving me to do a stupid little job just because the car belongs to my ex. He's done me, your wife, a massive favour, and you deciding to have nothing to do with the car doesn't offend my ex, it just creates more work for me.
Cue to my husband barely speaking to me for the rest of the night and leaving this morning without a word. Is it me or him?