O those damn tantrums, jeez they kill you....but NO is not a swear words - I teach kids every days whose parents do not say no and unfortunately they think it is their ticket to freedom - Life is bitch and will tell you NO when ever she wants, so better get use to it - I am on your side for this, but ouch that payback is epic.
It is truly epic! The payback, that is. It has to be done or side you will create a monster as you see!! Lol, it's an awfully phase though