You beat me to <Enter> by seconds.
I am really surprised that it took so long for this to happen, given the animosity that some have toward this game.
The developers should have expected this to happen eventually though, and I hope they already have at least a plan in place that can be implemented. I realize that it won't be as simple as just substituting 'roommate' for 'brother' and 'sister'.
I guess the easiest way would be to have a backstory of one of them being adopted at an early age. That should satisfy Patreon and not take too long to code. They can still call themselves brother and sister, just not blood-related any more. Any reference to them being twins, though, would need to be scrubbed. "This is my adopted-twin-sister," doesn't work