Let's skip the boring part were your wife, helped by the Nao twins, both the Seamaid and the Sub-sergeant, pick who will accompany her to the surface, along with the just as boring one where Junior Seamaid Natalie try to help her own husband learn how to change his tail into legs, and fail miserably.
It was now time for your wife, her sister-in-law and her half-brother to join you. The election didn't really need her around, (especially since, being a siren, she hadn't the right to vote, all regent she was) and it was better for their security. (They may be eternals now, it was still possible to hurt them.)
That wasn't the only merfolks who came with Ondine. She also brought the only doctor she trusted, Dr. Alan Saw; her cousin Ambrosia, aka "the mermad"; and a few persons, mostly sirens, to help protect all those merfolks.
Rather than making you move to go great them at the pond, and since Amelia was, technically, still wanted for the ‘crime’ of not renouncing her sister as such, she didn't dare go there, Ondine and you used your psychic connection to direct all this group to your sister's house.