So we recently found out that at her Mum's house, SD13 winds up younger SD11, to the point sister gets distressed and angry, then older SD will turn the argument into a physical fight and be quite violent towards younger.
We were already aware of 2 or 3 times it happened at Mum's, but we were sat outside last night with older SD & she spoke about it to me and my husband. She was quite open in saying that she winds sis up on purpose a lot at her Mum's with the intention of it becoming violent & will hit her on purpose. Usually when they're just watching TV. But doesn't do it at our house as she knows we won't tolerate violence and we'll be harder on her than her Mum is.
SD definitely has an attitude sometimes and has become a bit more arrogant recently (what we think is typical teen stuff), but we have never ever known her to be violent or to even really wind up her sister that much, she's so calm and chilled out at ours that my husband didn't believe it first time we heard about it, he thought ex was being dramatic (as she does have a tendency to be) and that it was normal sister fall outs or a bicker, so I think hearing SD actually admit it all last night, and that it can be really quite nasty, was a little shocking for us.
Both children seem to be doing well with us and are happy at our house, we thought they were very settled, we chat a lot and they talk openly with us about their feelings, so this really was a big surprise to find out how different they can be at their Mum's house.
I've wondered if it is different personalities of the parents, or if it's the structure of how we do stuff, different routines (I know we can be a lot firmer on screen time and phones), or if we are a little more present when we're at home as Mum WFH at lot and often out of normal hours so maybe they're more 'supervised' at ours, could even just be boredom.
Has anyone else experienced similar or seen how their SKs or even their own kids can be different when going between two households?