We have several clients who have children from a previous marriage.

Example:

Upon the husband’s death, he wants to make sure his current spouse has access to income from his IRA.  But he also wants to make sure the remaining balance, when she passes, goes to his children from his first marriage and not to someone else, i.e. her children.

How best to make sure that happens?  Using a trusted IRA or naming a QTIP as the beneficiary of their IRA?