Couple Breaks up and One Tenant Moves Out of State

[Debbie J. Skora]

In one of my rentals, the couple broke up and one moved out with the child back to the state they originally came from.  Lease states that all parties are jointly and severally responsible for the obligations under the lease, and that any refunds following termination of the lease will be made out to all parties on the lease.  The remaining tenant has also not paid rent yet - and was always on time before the break-up.  Should I get a written notice from the tenant who vacated?  Should I re-execute the lease with the remaining tenant (I believe she qualifies on her own).  Does anyone have insights on this?  BTW, property is in Texas.