"You don't feel up to taking it tonight? How about this time you take me from behind for a change. It's gonna be tough to not fuck your brains out afterwards. Being with you makes me rock hard and throbbing."
This is the proper way to break in fresh cunts. Notice how she can lift her pussy off the sybian despite the tight bondage. This is easily fixed by hanging heavy rocks from her upper shins. (sound in comments)