Dream about your nan is a clue for humbleness and humility. You need to apply what you learned and incorporate it into your daily life. You may be trying to convey a message to a person within the songs. The dream is a clue for your sensuality and femininity. You need to stand tall.
Your nan dream is a metaphor for your past experiences. You are wearing yourself out. You are in control of your emotions and are confronting any feelings and inhibitions you have been repressing. The dream is about how you see the issues in your life. Perhaps you are being too idealistic.
If you dreamt about your nan:
If you are also inviting someone whom you are interested in for more personal reasons, then you will find that you have a natural rapport and seem to be able to talk about anything together. You could make a great couple.