There's racial jealousy going on here too.
Winsome possess black skin of a particular aesthetic tone, while Christine is a sickenly yellowish-black.
Winsome is younger than Christine, so that may be a factor too.
Blacks - in Africa or in the Americas - are not monolithic. In the US there are "issues" between light-skinned and dark-skinned blacks. I'm sure many rural blacks wonder what in Hades is wrong with some urban blacks (and other urban blacks - ones who don't get on the evening news - probably do, too). Among those "issues" is tensions between some blacks who immigrated from the Caribbean, and became successful in some ways, and some urban blacks whose chose the victim-dependency way of life. And since those successful Caribbean black immigrants are the ones energetic & motivated enough to take that very challenging path in life, some who stayed behind,
e.g. mal, wallow in their own victimhood (e.g. blaming British and US Imperialism).
Needless to say, my opinions and a Hamilton will get you a latte and change at Starchucks. Oddly enough, judging people by their character rather than their skin color is actually simpler and more healthy mentally.