As mentioned in my prior answer, if the tax-deferred account is an IRA, and not a 401(k), and if you were designated as the beneficiary on the IRA account, then no, your sister's surviving spouse would not normally have any rights with regard to the IRA account at her death (assuming your sister was a Georgia resident at the time of her death).
Answered on Sep 10th, 2012 at 8:03 AM