SOLID [D] - Wrong implementation with high coupling

solid-D-wrong.cs

public class CreditCard
{
  public bool Pay(int amount)
  {
    // do something
  }  
}

public class Person
{
  public CreditCard CreditCard { get; set; }

  public Person(CreditCard creditCard)
  {
    this.CreditCard = creditCard;
  }
}

// calling

CreditCard creditCard = new CreditCard();
Person person = new Person(creditCard);

person.CreditCard.Pay(100);