The mother turned a blind eye to her son's mischief as she expected him not to repeat it.
While most television shows will turn a blind eye to fanfic written in their universe, some book authors are not so forgiving (while some, like Flint mentioned above, are quite open to fanfic).
Police, apparently, turn a blind eye to such trifles.
You chose to let Jade go and turn a blind eye to him being a traitor. You chose not to see Hannah was a shapeshifter.