My daughter already sleeps in my room, she’s never slept in her own room because she wakes up all through the night so it’s easier if she’s next to me.
I'm so sorry I cross posted with you saying this - that's brilliant that she will be with you. Poor wee lamb, she is such a brave girl for telling you that so you must keep reinforcing that and that you're so proud of her.
Don't mix up into that anything about what happens to her brother next - eg don't say it's good you told because we can get him help - you can say he did something that is very wrong for children to do and so you are going to talk to other grown ups about it to make sure it never happens to her again.
And she must keep telling you if anything happens or even if she remembers something from before. What I'm trying to explain clumsily is dont subconsciously creative a narrative where her brother is ill and needs help.
Yes that may be true but that is too grey an area for a six year old and makes it sound like he made an accident / faux pas.
The only narrative she needs to know right now is - I was brave to tell my mummy something wrong happened, she is proud of me that I told the truth. Now, she is going to keep me safe by being close to me, listening to me and also talking to experts who's job it is to help parents keep children like me safe.
I've probably worded much clumsily but I feel for you so much.
And I hate to even say this but you need need need to get some professional help if not tonight then tomorrow for your son because (I hate even mentioning this) children are so much more easily exposed to stories about self harm and suicide now that they are very real concepts that need to be risk assessed by professionals.
This is going to be a fucking horrible time but you know what? Any time of day at all there are always people on here offering help.
As long as you commit to involving social workers IMMEDIATELY and agreeing to whatever they say, even if it means reporting to police, you need to go with it.
Your son has done a terrible thing which means your daughter has been sexually assaulted at six. It's going to be a long road but we are here for you.
Ask for every bit of help and support the professionals offer you.