The scene where Lizabeth returns to her guardian/rapist and she gets her revenge. She stuck something up his … well, the back of his front (to try to put it delicately.) What was that thing? I could have sworn when she took it out her bag at first she touched the bottom of it and it made an electronic beep.
I’m fairly certain it was a taser. I read the series last winter so my memory’s a little fuzzy.
A taser? Seriously? At first I thought it was a dildo, but then I heard the electronic beeps.
I could definitely see a dildo beeping.
I really liked her character. I don’t think you would ever see that kind of intensely controlled intense rage in real life, but it makes for wonderful fiction.
My favorite scene was when she was chasing after Martin on her bike and he crashes, she’s really, really going to enjoy airing him out and then the car explodes. I felt so bad for her, but knew it was the best thing for her character. Great scene.
From bookslut.com:
I’m not at home so I can’t get my book and re-read the actual passage.
The site doesn’t say what she inserted in him, it just describes the tattoo she gave him, but she definitely had a taser.
So you have no problem with ‘dildo’, but ‘ass’ is taboo? 
Just read the book. She tasers him. Then cuffs him with his own cuffs and then shoves a dildo up his backside without lube.
She tattoo’s him as well.
Hmmm, I hadn’t noticed that. Good point.