"Catherine was rich; she was also willing."

Henry VIII's sixth and final wife, Catherine Parr (1512 - 1548), outlived him only to die in childbirth less than two years later.  Catherine developed a close relationship with Henry's children and brought her influence to bear on Henry in his Third Succession Act (1543) which restored both Elizabeth and Mary to the line of succession.

Henry had given Catherine certain powers, most notably that of acting regent during his absence on a military campaign in France. But the terms of his will, while leaving her a generous financial and property settlement, took away all power, leaving a council headed by Edward Seymour to rule during Edward VI's minority. 

Catherine did, however, assume the role of stepmother to Elizabeth.  She also remarried, her fourth husband being Thomas Seymour, some six months after Henry's death.