been a while since I read my english copy. I think I still have it from when i was a kid.
I remember the tale of 2 twins. One went out and did stuff, married a princess, then disappeared. The other came looking for him, got mistaken for his brother by the princess, and had to sleep with her. he put a sword between them in the bed.
Later, his brother came back, though his brother banged his girl, and killed him. Then he found out what really happened and felt bad about it. Somehow, he got the brother raised, if I recall.
Grimm's game was very munchkin it seems.