A gold and amethyst bracelet that snaps onto her wrist the second she comes near and stays on until night time. In the interim, it screeches aggressively for two minutes whole whenever anyone of the opposite gender comes within a 1m radius of Allison.

The hottest new thing in chastity belts, the wrist-bearing edition.

( It can reattach the next morning if she comes near it again, if you like! )