ANSWER:

It’s totally prohibited to remove the eyebrows by any means and it comes under major sin. 

No problem in bleaching the extra hair but must conceal this in front of non mahram men and while going out as this comes under adornment. 

I have recently gotten married and my wife used to do her own eyebrows and I informed that this so sinful. She has now stopped threading alhumdulilah. However, now her eyebrows grow very strange and I don’t feel attracted to her anymore. What to do? Can she go back to threading them to look normal again. As now they look too strange and bushy due to her old habits.