#24,482 - shows you can get it about 25% of the way into lewd content of v0.89.8 (Seasons 1-4) - the task you are looking for is "Find Tiffany's clothes to have some fun."
There is no "fourth route" for the game. However, one could expect this to show up in the Netorare route version, once that part of Taffy Tales is broken out into four seasons so that the developer can implement content without (hopefully) worrying about saves from the point on.
Uberpie doesn't dislike netorare. It's the coping mentality of some players to say the Netorare route was something new. Uberpie planned to include netorare from the start, even before lostraven was brought on board. Also the urination content isn't something newly added, either. Players can see it in one of the bathroom scenes with Clara and the MC. Some people don't fully realize what Uberpie's interests are.