How is that additional sentencing? In essence, they proved themselves to be unfit parents (because, you know, the whole grooming for crime thing), and had their kids removed due to that. It's like if you lost your job because you were convicted of a crime. That's not additional sentencing, that's just a consequence of your actions
Trusting the government to do the right thing is a poor idea. Politicians will only do the "right" thing if it helps them out.
Without any information, this is just idle conspiracy theorising. It's not even about politicians, since from the sound of it this came from regular govt officials, not elected politicians.