Legal Question in Landlord & Tenant Law in Illinois

If this is HER arrangement and you just paid for her, and if she is entitled to money back, then she should reimburse you. Otherwise she probably owes you the entire amount you paid but the presumption in such cases is that the money was paid as a gift, not as a loan, so unless the rules allow for a proportionate refund, you both may be sunk. Ultimately, insufficient facts to render any reliable assistance.