Nice to see this still thriving, though I also am firmly in the 'anticipating more content for mom and sis' camp. Something to look forward to, I suppose.
Some of the most interesting time I spent with this was 'accidently' using the strange dildo on the mom and watching the various scheningans ensue. Seemed odd that we couldn't use it on the protagonist or the sister, but them's the breaks, maybe it'll change up in the future. Or it'll inspire a new serum. Or whatnot.
Since they will actually be getting different paths ala penny, perhaps this time around you can entice their affections without turning them into village bicycles. Or on the flip side-- joining the sis in her quest to be a camwhore/adult movie actress could be fun, too, providing it doesn't all railroad into the bad ending town.