If I name trust created in will named as beneficiary after me and my spouse are deceased. If my spouse remarried how to ensure her new spouse does not become beneficiary. How I can stipulate me and after I am gone my spouse will only take RMD so remaining balance would go to children or grandchildren who has 10 years to empty total account. How IRA account will be titled after my death and what time frame so no tax at trust level is due and trust would be conduit or pass through for distribution