"Not nearly so easy to get out of it."
Anybody can break a promise... It takes a lawyer to break a vow!

"a mere thimblefull of water over big pile of embers"
Your mistake is thinking that it's your fire to put out....

" There is, I am afraid, no such thing as kicking her out altogether."
Then maybe the law is different over there.... Too bad... You aughta lobby to have it changed.

"plea for sanity"
In this world?!?! See above re: Ducks meowing....