Situational irony!
Because, she initially thought she was free from her husbands wrath. She celebrated and her heart was happy, this only to end with such a heartbreak that it kills her.
A
The narrator's honesty in a matter that doesn't entirely complement him makes him seem genuine.
Blogs would NOT be a valid source for research. Blogs are more opinion-based than books.
It is deep, pure, sometimes blue and sometimes green, not very abundant in fish besides pickerel, has an irregular shore, and is inhabited peacefully by ducks and geese and frogs and other wildlife, like White Pond, a nearby pond it resembles.
Hope this helps