I am still thinking about that hypothetical nesting arc for that domestic fic; siren!Doppio is gathering nesting stuff and trying to find egg shaped things to practice brooding (sitting on eggs) and stockpiling snacks in said nest, meanwhile harpy!Diavolo is getting weirdly aggressive, getting even more territorial than usual, and nearly jumping reader half the time. Reader is at their wits end trying to figure out to do, because they have no real reference on any of this.
(Granted that there's a 2/3 chance of mpreg in that fic, but either of those two getting knocked up is a double whammy for reader because they have to do research on all this shit-)
