She has Caribbean heritage. Think about what type of hair she may have - she could have a coily or kinky hair subtype (if you watch videos online, you'll often hear about 4a, 4b or 4c). Different subtypes of hair need different levels of care, products and time spent on them.
Whereas some people may be able to stick their head under the shower and be done in five minutes, somebody with long 4c hair, for example, would need to spend significantly longer caring for their hair and scalp.
There's a lot of information available on the internet, but this https://en.wikipedia.org/wiki/Andre_Walker_Hair_Typing_System might help explain some of the concepts.