I have two step kids (11 & 8) who come to stay on the weekends. We have been having them over as long as my DH and I have lived together so 5 years, and in that time I've noticed a huge change in them. Their mum seems to let them stay on technology most of everyday and they have started speaking and acting like youtubers. They often talk to me as if they are talking to a camera and say a lot of American phrases in place of things they used to say. I believe they do go on walks most days but while they are in the house its technology for hours and hours each day. We have actual tears and tantrums here when we tell the kids to do something else for a few hours.
My question is, should I ask my partner to say something about this to their mum? Or is this considered normal amd im just being an old square? I like their mum, my partner has a good enough relationship with her too.