Last time I heard, it was still a bad thing to be a slut in Kenya (unlike in the west where it is cool and emancipated). That means that even the sluts don't want to be seen slutting. There are some massive Kenyan sluts but they are relatively discrete (they love being taken to hotels, particularly in other towns). Other girls just need a bit more time. Even then they will not want to be seen with a man by anyone who knows their family or close friends unless that man is a suitor not just a boyfriend. A man is usually only introduced to parents when he has already agreed to marry her. This introduction can be quite formal and involve the discussion of bride price.

So if she is a slut take her elsewhere. If she is an ordinary girl give her more time.

Bear in mind that, since slutting is not cool, even sluts do not want the men they slut with to know they are sluts. A Kenyan girl should not be seen to be too keen to start. Kenyan men chase hard and spend liberally. If she gives you nothing to chase she is too easy by Kenyan standards. "No" usually means "later if you have proved you are keen".