Is it permissible for a husband to write a lease agreement for his wife, who has no children, for an apartment he owns, which terminates upon her death, knowing that she owns no other residence?

"Leasing is not valid unless for a known period. What is intended here is not a true lease contract, but rather a gift of the usufruct of the apartment to the wife until her death. This gift is not binding, because it is a gift of usufruct that is consumed over time, and the giver can revoke it whenever he wishes. It also becomes void upon the death of either party."