This sounds a lot like My Best Deal. Do you at least get to bang the Mum in this game?
The MC in that game has to be the biggest Pussy, I've ever seen. Blessed by the goddess with all this sexual prowess, and even a bit of mind bending powers, and can't bang the mum. Sad.
Don't like incest games where Devs make the Mum the Holy Grail, like she wouldn't want to be the first to put the MC back where he came from. That shouldn't be the point of the story.
Anyway game looks great, hope you can bang the Mum, though from the description it doesn't sound like the MC's soul is actually related to any of them right? So not really incest right?