Why couldn't Scarlett O' Hara just asked Frank Kennedy for money instead of marrying him in Gone with the Wind?

In the end, Scarlett has to ask Frank Kennedy to marry him
for two reasons.   Scarlett could not simply ask Kennedy for money as a matter of social
tradition.  At the time when she accepts Frank Kennedy's offer of marriage, Scarlett
still believed, to an extent, the Southern conditions of honor and tradition for a
woman.  She recognizes that Frank is fundamentally weak and would not recognize her
advances without a marriage, and so Scarlett steals him from Suellen in order to get
what she wants.  Accordingly, Scarlett could not very well have asked him for money
outright.  Rather, she was bound to accept his proposition of marriage and then do with
him as she needed to as his wife.  There is a part of this that is reflective of
Scarlett's sibling rivalry and her desire to be superior to her sisters.  This is why
she covets Frank's money and his position as Suellen's fiancee, resulting in her
stealing of him.  The combination of desire for something that is not hers, money that
will help Tara, and the need to continually be in a position of power are all reasons
why Scarlett could not simply ask for money, but rather obtain it in a manner that shows
strength.