Her children were monsters. Unnatural beings who feared the sun and fed on human blood. And she was the one who created them.
Henrik's death sent her mad with grief. She had already lost Freya and to lose Henrik as well was too much. So she immortalised her remaining children.
That was a terrible mistake. She robbed them of their humanity.
Finn became self loathing.
Elijah ruthless under his noble façade.
Niklaus dangerous in his quest for absolute power.
Kol's mischief no longer harmless.
Rebekah no longer the innocent with dreams of a family,
She had ruined them irreparably forever.