IT'S A STRAP-ON DILDO!
[Lara unties you from the chair but keeps your hands tied together behind your back, bends you over a near-by desk and then ties your legs to the desk]
"I did warn you but you didn't listen. This is about to get really serious in a hurry but I'm gonna enjoy every second of it. I'm lubing up the strap-on right now. Last chance to give in before I give your asshole a good fucking!"
[Lara slides the strap-on inside your asshole and starts to furiously fuck you (200 fast thrusts). If you have a toy to do this with then use it but if not, just hump something and mimic that Lara is actually fucking you. However if you are ever on the brink of cumming, she stops and waits for you to calm down before continuing]
"Oh yeh, that's it my little bitch! Take that cock. Take it up that asshole."