The twins try to behave normally with their father or his pod person, whichever the person who calls them is, for a value of "normally" that involves adamantly continuing to want nothing to do with the Sharing.
And sometimes crying and refusing to tell Renée what's wrong.
School proceeds. No one's grades see more than a minor downturn as a result of all the alien business.
Andi and Robin play music. Andi's getting pretty good on the drums, although her teacher moves away and she has to hunt up another one, who she sticks with for four lessons before deciding to go self-taught.
Bella tightens up her cipher. It began as a letter substitution and since then has evolved to include plenty of personal shorthand - she turns the ratio of shorthand to straightforward letters up as far as she can and still read the thing herself. She abbreviates, she leaves out spaces, she names things in roundabout ways, she refers to things many notebooks ago that she can find easily that anyone else could spend hours hunting for, if she has to record names she finds ways to describe the spelling without ever placing all of the characters in sequence. Maybe the aliens have super-cryptanalysis and super-OCR and can eat her notebooks in one bite and know everything they know; but maybe not, and maybe if she's careful enough she'll look like she's writing her paranoid diary and not like she's taking notes on the quiet invasion.
Trouble comes over a lot. He stays over a lot. Renée has a quiet conversation about him with Bella, in which Bella is vague, pretends ignorance, suggests that maybe he just likes it here, maybe his folks are allergic to gluten and won't eat his baked goods? Renée leaves it alone.
May begins.
"And you're not having any trouble standing, moving extra fingers or the eyestalks or the four legs or the tail, it all just makes sense?"
"Well, there's still tone-of-voice going on when you thoughtspeak. Nothing too obvious in the face, though."
<It's the eyes, and the whatever these are,> he says, gesturing at the three vertical slits in what on a human face would be the nose-and-mouth area. <Kind of subtle.>
"...Is it some sex thing, is it just me or is it totally skeevy to use a dead guy's body that way?"
"Anyway, he gave it to me in the clear," he points out.
"What if I solemnly swear not to use it for anything dirty? Not that I especially want to morph you in the first place."
"I remind everyone that there may be a limit to how many of these we can collect. That said, it might be useful to be able to cover for each other, particularly insofar as we can successfully imitate each other's personalities."
"In which case, Ethan and I should definitely morph each other," says Robin. Smirking.