Don't remember exactly how many endings are there, but they are very barebones and only serve one purpose. To unlock new outfits / features / cheats for future playthroughs. I will make proper endings with cutscenes and everything once large part of the game is finished or when the main quest is finished.
As for age interactions, there are already few of them in game. I didn't add many yet, because there simply is not enough content in the game past the first year and a half, but I will definitely add more in the future.