This is giving me a great idea: unlockable "bad ending" scenes with New Game Pus. Lots of other games have done this as a way to add interesting content, flesh out the story world, or insert some tonally mismatching content. Examples would include Crono Trigger and FFXIII-2.I believe MagicNuts said they might do that (MC getting an orgy with his moms) as part of the epilogue. Personally I doubt it happens.
Basically after you beat the game, you can launch a NG+ with some new plot options. This would be a way for MagicNuts to put in silly or experimental things that might contradict the tone of the "main story" - no one who hasn't finished the main story will see them.
In specific, the prologue would have an added dialogue option where Lassie could choose to be patient and keep living at the whorehouse rather than strike out into the world. If the player chooses this, he gets the birthday orgy with his "moms" - but the Big Bad Guy winds up conquering the world, because Lassie didn't go on an adventure to stop him! (I guess because of the anti-NTR extremists we can't show an actual CG of the BBG fucking Princess Serena, but it could be implied). Then there's a "retry" button that takes you back to the "wrong" decision branching point.
Later on they could include other "bad ending" scenes at various branching plot points, to try out different endings or just crack a joke. Each would end with a button taking you back to the "mistake" so you could proceed with the "correct" plot. Maybe have the "bad ending" options be colored red in the menu so you can't miss them. I add these suggestions because I know MagicNuts aren't interested in making a game where you can "lose" and face a game-over screen, so putting these bad endings in NG+ only and making them closed loops that return you to the correct decision would eliminate any chance of player frustration.
Obviously I know this would be a lot of extra work and I'm just shooting off my mouth here. But maybe if they wanted to add other content or just play around in this world after it's "finished", this is a way they could do that without having to unravel any threads already woven in.