It would be the first option - <span>her determination that Janie should have everything she never had.
</span>Nanny's experience of being a slave marked her worldview with a strong need for financial security. She doesn't want Janie to experience that type of hardship that's why she forcer Janie to marry <span>Logan Killicks, a successful farmer. Nanny values financial security over love.</span>
I would say the second option - "She skipped off, singing"
It gives a visual of her being very happy, instead of just saying she was happy.