In "The Rope" Chapter of Kindred, what does Rufus want from Dana now that Alice is gone?

Rufus plans to
have sex with Dana and make her take Alice's place. Dana is a descendant of Alice (and Rufus,
for that matter) and she resembles Alice greatly. When this episode takes place, Alice has just
hanged herself. She and Rufus have several children together, and Rufus has threatened to sell
them as a means of controlling Alice. Instead, Alice kills herself. Rufus has lost the enslaved
woman who is forced to have sex with him and bear his children. He now plans to replace Alice
with Dana. He has also enslaved Dana when she is in the past, but by this time, Hagar, the child
of Alice and Rufus who is Dana's ancestor, has been born. Until now, Dana has been carried into
the past in order to ensure Rufus' survival. Now that Hagar has been born, Dana is free to stab
Rufus in order to escape.