Great work with the translation as always. I feel like this giant fox form is the payoff for the tanuki fight earlier. It serves it's purpose beatifully.
Also i think that the fox waifu being a monster that enjoys a challenge and has pride on her powers, probably won't chastise the husbando too much, probably she does feel proud of having him.
To think that this started from a man that went to the mountain to kill himself to this.
I feel like love can be a super strong force for people to evolve and grow.