Conundrum

So. My mum has wanted to see Kylie Minogue in concert for a few years now, but she's never done it because tickets are always really expensive.

Kylie's just added another Brisbane date to her Aphrodite tour. I suggested that she go and see it (or we could go, whatever) and she said "no, the tickets are like $150...I know I'll regret it, but oh well".

Centrelink started giving me my student benefits a couple of weeks ago, so I got backpaid for all the student benefits they should have been paying me this year, so I got about $2000 in a lump sum. $1000 immediately went into my savings, $500 has been used to pay for things like fuel, groceries, kitten stuff, and various debts I needed to pay, so now I have $500 left that I could put in my savings or use for something else.

So. Do I:

1. Buy my mum a ticket so she can go by herself?
2. Buy two tickets so I can go with her so she won't be alone?
3. Not buy any tickets and just let her "I know I'll regret, but oh well" comment pass by?

1, 2, or 3? Suggestions, comments, theories? I'd do it in a heartbeat if I knew she'd be happy about it, but I don't know if she would...she might throw a massive hissy fit and not go out of spite. What do y'all think?

ETA: Had a frank discussion with my mum, and she decided that she was too sick to go, but that she'd catch the next Kylie show to come through.