Legal Question in Civil Litigation in Illinois

and your question is?

The landlord can enforce the lease against you, and you can enforce the private contract against your friend (i.e. sue her).

This reply is epcifically limited by the information provided, and does not constitute an attorney-client relationship.

You will be held responsible for the original lease.

Then you may go after your freind for the damages you incur.

Assuming your question is regarding what is your recourse against your friend; the answer is that you can sue her for the damages you have incurred. That is the amount of the moneys you will have to pay under the lease you have signed with the landlord--because you are responsible for the payment of the rent for the entirety of the lease.

I hope this helps-