An elderly woman cares for her sick husband for many years with great devotion until she can't do it anymore and has to put him in a nursing home. Her children convince her to take a long cruise to recuperate. A few days into the cruise the husband dies. The children try to convince her to complete the cruise and skip the funeral.
Is the decision at her own discretion or is she halachically obligated to do one or the other?
(The high cost of a cruise and her need to recuperate are factors.)