Denise in the Sleepless Collar

Denise was getting tired at the end of a long shoot day, so I told her ‘let’s try one more thing!’. Denise knows me… nothing good will happen after I say that. Still locked in her belt that she’d been wearing for the entire day, I presented her with the Sleepless Collar. It’s heavy, with long solid spikes. Denise didn’t really understand the purpose of the spikes until it was too late. All she really wanted is to lie down, but she couldn’t rest her head on the floor! She tried all kinds of different ways, but it was hopeless. A very sulky Denise was the result. How long would you have left her in the Sleepless Collar?