1)
How is her house "Darchei She'ol"?
1.
Malbim: She'ol is a deep pit. One can fall in it before he dies. One who goes on the path to her house, he is already going on the way to She'ol and will fall in a deep pit.
2)
How do they lead to rooms of death?
1.
Malbim: The verse depicts that death dwells in the deep rooms of She'ol; one who comes to She'ol, from there he descends to the rooms of death, i.e. he comes to sin.
