(decedent bequeathed his personal property to his wife, the stepmother of his son, “to be hers to use and enjoy for and during the term of her natural lifetime”; the will provided that at the death of the wife, “all that remains of my estate” was to be divided amongst his son’s children; the wife survived the decedent by 16 years; after the wife's death, the grandchildren sought to recover the value of a $100,800.79 bank account that existed at the time of the death of the decedent; the wife's argued that she was entitled to consume the personal property during her lifetime, and the trial court agreed; in reversing that portion of the order, the court found that in Illinois, a life estate in personal property did not grant the life tenant the right to consume the corpus of the property; rather, the wife was entitled only to receive income from the principal; to grant to a life tenant the right to invade and consume the principal, a testator had to grant such a right in explicit language).