Okay, number 1 I was joking with HP which I dont think you got but not sure how that concerns you honestly, just saying. Number 2 ribbing BD about incest is something I have done since the game dropped originally as well as also giving some feedback/suggestions on possible things that can be done IF he wants to. He does know I back whatever he wants to do and fully support it 100%.
There are a gigazillion incest games on the interwebz and I know BD loves to troll the 'Make it incest' crowd and so do I honestly IE my original post which both HP and you chose to take the bait on.
Now in regards to LP, no it doesnt have to be 5+ years from now, they could do it now if the modder wanted to much like many incest and loli modders do during a game/vns development. Look at Ecchi 'Teacher', its on patreon and has been longer then this has, it has incest and loli content due to the evil modders dark patch and yet it is still on patreon.
Also patching this the same way as Ecchi 'Teacher' wouldnt require much really with how this is already written, most of the story and teasing BD has done would make this easy honestly. All it would be is a modified script and the added renders/animations in the patch that insert the new scenes and dialogue at certain points that make sense and go with how it was already written.