Complex sentence: Another day, Domenico witnesses Alexandro tell a story about a boy whose father died, and whose mother married another man who was a violent drunk, and after impregnating his mother, flies into rage and tries to kill her.
Split into simpler sentences: Another day, Domenico witnesses Alexandro tell a story about a boy whose father died, and whose mother married another man who was a violent drunk. After impregnating his mother, the man flies into a drunken rage and tries to kill her.