Why won't she sign another lease?

There is probably a month-to-month clause, which means at the end of the 12 months, the lease continues in effect on a month to month basis (basically the term of the lease then goes to just 30 days, and renews automatically every 30 days). In that case, you ARE on the hook, because the lease is still in effect until she moves, they evict her, or she signs a new lease.

You need to get off that lease right away. But if she's paying month to month according to the terms of her lease, and she's going to move out within a month or two, there's no rush. If she's going to renew it, she needs to sign a new lease without you. They already know she can make the rent every month, so they have no reason to require you to still be on it.

Karen