She knows in general what to expect from her adventure but most likely prepared for pretty much anything and accepts everything that is coming her way, and in the process is getting really exciting which is pretty obvious from her facial expressions, sometimes pretty happy ones ;)
When she sticks her butt through the window she is trying to see what comes next and that creates composition similar to the picture on 1 dollar bill ;)
The entire video is 40 min long and full of excitement and action!

This totally hot high def video finds Aneta all alone in a stark white bed wearing a tight white dress with no panties.
For this shoot she brought along her favorite sex toy, a purple vibrator with a fresh set of batteries to ensure that she doesn’t just cum, but has an intense orgasm.
Witness her slow build as she gradually increases the depth of her thrusts and the pressure on her clit until she reaches the point when she can take no more, and has to completely let go.
She is the picture of sexual self-fulfillment as she stretches out on her bed without a care in the world.