Winona Ryder - Would she really steal Diamond Jewellery?

Winona Ryder is in the news again, not for something good unfortunately but for Stealing Diamond Jewellery

She was apparently lent the diamond jewellery to wear at a Marie Claire Party by a top jewellery. A Diamond Bracelet and Diamond Ring have both gone missing. Winona said that she left it with the hotel staff, but cameras have been checked and there is no sign of this.

Winona does have a record for Shop Lifting from a few years ago - but how easy would it be for someone to set her up to?