If you knew the movie you'd know why. It's actually a short film, search youtube for "The other side of the box", you'll know which one when you see the thumbnail. I was angry, too, that he left his wife with the box, but it makes kinda sense in the film.
Never explained in the game, tho.
Edit: Also, calm down. All your interpretations of the dev's character and life choices based on a small game he published on itch are ... I don't find the words.
Speaking as a women here, please use this energy and defend women's rights where it matters and not by capslocking the comment section of an indie game. We have much more problems than storylines like that - like the games on Steam where the whole game is to "beat up hookers until you get your money", please go there and unleash your fury on those devs. :) I'm totally rooting for you!
(Plus; thinking about it - I'd have asked my husband to get help, too, because I'm not even taken seriously when I'm explaining the stuff I have a friggin bachelor's degree on. Trust me, guy-person would have had much higher chances of anyone believing him. Just on a side note. :) )