Respect her parents
If she is a woman you desire as a life partner, you must respect her parents when you eventually visit them. For example, if she is from a Yoruba home, you will be swimming in the waters of respect because the Yorubas from south-west Nigeria value respect.
So, you are expected to greet not just greeting but prostrate. This will put you in the good books of her parents. Other Nigerian ethnic groups have their rules for respect.