According to the artist, the meaning of the cuneiform is "𒊩𒌆𒉿 𒋗𒌝 𒄩𒆷𒄣 (MA-RA-TU ŠU-TU HA-LA-QÚ) "Girls Last Tour" was translated by Chat GPT, so the truth is unknown."
imagine if both the husband and the daughter doesn't know that she's an uma
Common sense makes that impossible. And I don't mean ours, everyone in the Umaverse knows that the Uma mom = Uma daughter. No matter how well she keeps it a secret, as soon as the baby pops out everyone will know the truth. At most they could lie to the daughter and tell her she's adopted.
I think the dog-thing in the top right corner is supposed to be akane, since it doesn't resemble anything else from ranma + this artist has depicted akane as a dog before