Hi all, so this is my first post on here and as such I do apologise if I've come to the wrong section etc but here goes.
I've currently been with my girlfriend for around 7 months and over that time i have had a large amount of involvement with her son who is 5 so we know each other quite well and this past week I have been picking him up from school and looking after him for a few hours until my better half gets home from her job that she's recently started.
The issue I've had, which admittedly has only happened once is that today, the young one seemed to be in an absolutely great mood after school and was very excited to go to my house but once he got into my car he changed his tune immediately and became very grumpy. When we went back into his house he seemed to step it up and kick off his shoes and throw his coat across the room. When I asked him politely to pick his coat up and put it on the chair he openly refused to and repeatedly did so while also telling me to be quiet. This went on for around half an hour until I told him to go to his room (I did so as I've witnessed his mum do the same for much lesser things).
When I'd said this he immediately started to scream and cry (minus the tears) and sat half way up the stairs then refused to tell me what was wrong. This carried on for around 40 minutes with him stopping at 5-10 minute intervals and coming into the room completely dry eyed and silent before the screaming begun again. Eventually He went into his room and carried on screaming until he fell asleep.
I text my girlfriend and she agreed she would have done the same but when she got home she seemed to be defending his behaviour and seemed quite annoyed with what I'd done even though she had essentially sanctioned it.
My general questions are,
Is this something I need to worry about?
Does anyone else experience this (what seems to be) crying and screaming as loud as you can until you're off the hook?