The Coffin Of Andy and Leyley Wiki, an encyclopedia for the popular game about the dynamic duo of cannibal siblings!

you take the "Abnormal" ending which heavily implies that Ashley and Andrew sleep together in the future

Sorry for not replying fast enough, it's a horror RPG game about two siblings (Andrew/Andy amd Ashley/Leyley) being toxically co-dependent with one another and being rather mentally unstable to say the least, the game's tone is rather bleak and also has so much incest subtext in regards to our MCs to the point that one optional ending can actually make these two lunatics engage in incest.

horror game, but glorifies incest