If you were looking for a highly-rated mainstream series involving a "cousin" dynamic that is critically acclaimed, you might be thinking of:
Western streaming giants (Netflix, Amazon) have become cautious. African web series producers have not. My Cousin Sister uses a subject that most cultures refuse to discuss openly. This "forbidden fruit" appeal drives curiosity. People watch because they cannot believe the show exists.
Why the low score? Viewers often cite weak writing, illogical plot twists, and overused “forbidden romance” tropes. However, some praise the emotional core and performances.