Ahh, this is so sweet, thank you so much for sharing this with me! (You happened to draw Arthur with the same camera I use which made me smile haha).
Once my stories are out in the world I encourage players to come up with theories, interpretations, etc. Arthur and Edith's relationship is also hinted towards turning romantic in the game (though not outright said) so you're absolutely fine!
I'm glad you enjoyed the game and characters, thank you again for playing!