2. If your lease relationship is legal, then you have two legal relationships: one is the house lease relationship between the landlord and the second landlord; Second, the sublease relationship between the second landlord and your house. In the first legal relationship, if the second landlord defaults on the rent, the landlord can of course take back the house. If the landlord repossesses the house, then the second landlord has violated your contract. Therefore, we can only ask the second landlord for rent and ask the second landlord to bear the liability for breach of contract.
Supplement: From what you said, you have no right of abode.