Nah I wouldn't touch her Mum. Too big.
And her sisters are underage. Not worth going to jail for.
Her friends however are an alright one.
Plenty of ways to get back at her.
Gu touched on some good points.
- Sleep with as many of her friends as you can, and make sure you tell them
that they were better in bed than your ex.
- Sleep with as many members of her family as possible, sisters, aunties, mother, grandmother, cousins, etc. and also remind them that they were better in bed than your ex.
- Release the sex tapes of you and her. Send them to all your mutual friends, send them to her parents, put them up on the net, etc.
- Go to her place and take back any gifts you ever gave her.
- Tell her that she's dead to you, and ignore her completely.