Discuss the root or causes of the sibling rivalry between Florence and Gabriel. Is it repairable?

Go Tell it on the Mountain

Florance's Prayer

Sadly is not possible for us to know if Gabriel's and Florence's relationship is repairable, since the rivalry was caused by their mother. She preferred Gabriel because he was a boy, he became spoiled, selfish and arrogant, he got all his mother's attention, on the other hand Florence was treated like the servant of her own home and that caused her to be bitter and hateful.