This is MN not court of law. When a poster says they have been raped, we don't say " oh you were asking for it as you were drunk " as the barrister will say in court.
If a woman says " my partner has just died " we don't say " why do you care, you were a crap wife anyway " . Even though that might be true .
Someone posts " my wife has cancer and the waiting time for treatment is 6 weeks" . We don't lecture him about scare resources in the NHS and how it's his own fault because he voted Tory.
We accept most posters at face value and offer support. This isn't the place for social workers to moan about how hard their job is , they can start a new thread for that.
It's not the place to analyse the faults in the child protection system or to launch a robust defence of it.
We should be believe and supporting the OP. Because a terrible thing has happened to her and her children, however you look at it.
It doesn't seem to have occurred to a single poster that the allegation might be true AND the OP might be totally innocent and know nothing about it . For example, a relative might be sexually abusing one of the children.
No wonder the OP is long gone. Some of you are high on political correctness and defending your own postion and very low on empathy.