I went to drop dc at their Dads new flat today. He invited me to see it and drop kids off etc. He showed us round and then into the garden raving about the built in BBQ and Pizza oven. They were at the end of the garden and he pointed them out so I went to have a look. I was half way down the garden when I heard him say "no kids don't walk on the grass, it's muddy". I was almost by the BBQ so carried on, he made a snide comment to the dc along the lines of "well Mum has gone on it so I suppose I will have to let you too". I kind of raised my eyebrows but left it there. Anyway came back to the flat (it's a shared garden) and wiped my feet thoroughly on the TWO mats both inside and out as I went in.
Once inside he told me to go out to my car to get something dd was moaning about, I said no as I was leaving shortly and would get it then, at this he told me I was the worst and rudest house guest ever 
and to get out and that I would never be welcome there again then launched into a rant about how rude I had been to continue up the garden after he had told me not to. I told him that I had fully intended to take my shoes off once I got back but after wiping my feet thoroughly on TWO mats one after the other and as I was about to leave had not done so. Again told I was a terrible houseguest, worst he'd ever known apparently and asked to leave, which I did. All this was done in front of my wide eyed children by the way.
So thoughts please? We are usually on fairly amicable terms as long as I mind my P's&Q's just to give some background.