[Serializable]
public class Family
{
    public Family()
    {
    }

    public Husband Male
    {
        get;
        set;
    }

    public Wife Female
    {
        get;
        set;
    }
}

[Serializable]
public class Husband
{
    public Wife Wife
    {
        get;
        set;
    }
}

[Serializable]
public class Wife
{
    public Husband Husband
    {
        get;
        set;
    }
}