Hellins character is a perfect one to get into this kind of abusive relationship unfortunately. Men like knob can spot women like Hellin a mile away. They sense vulnerability and exploit it to the full.
Hellin is complicit only in that she refuses to accept she was wrong, or listen to anyone else daring to question her choices. She put her blinkers on the moment she set eyes on knob and her stubbornness makes her refuse to take them off.
She's not likeable but you still care about her. No one deserves that.
And she definitely can't just tell him to leave. She has given some parental rights to knob (or did that not go ahead?) but knob will argue in the family courts that he has a good relationship with Henry as does the witch therefore he should maintain a relationship. Of course he will have parental rights over his own child so Hellin will never be rid.
Dare I whisper 'family annihilation'?
. Knob is a prime example of an annihilator and it's happening more and more. I DONT think it will happen as its a bridge too far for the Archers but either way it won't just end unless something dire happens to him.