I have 4 DC, aged 8, 6, 4 and nearly 2. In general they are pretty good kids. The most volatile relationship for a while has been between the second and third (DD2 and DS). But now DD1 seems to be entering the tweenie stage and her changing priorities in life seem to be driving a bit of a wedge between her and DD2.
So it seems that not only the arguments are escalating, but the tone of voice / shouting / generally bitchiness in the older threes' attitude to each other is deteriorating. My instinct (and everything I've read) tells me to back off and let them resolve their own issues, only stepping in if they really need adult help to finding a solution or are in danger of physically harming each other. BUT, I hate the way they shout at talk to each other. If I ask them to talk in a civil tone, I end up getting embroiled in the arguments. Is this just an inevitable part of growing up, or can you instill decent behaviour between siblings? Should I insist (and consequently have to police) civil arguments, or allow them to belittle / threaten / demean each other?