Does the husband have the right to demand the house and car he gave his wife as a condition for her return to him, and is she obligated to return them to him if she requests a divorce?

The basic principle is that it is forbidden to revoke a gift, except in the case of a father's gift to his child, or a gift intended for recompense. If the recompense is not received, then it is permissible to revoke the gift. If a husband gifted something to his wife for the continuation of their companionship, and then the wife sought separation after a short period, the husband has the right to revoke his gift. However, if a long period has passed, he does not have the right to revoke it.