First add some precautions to ensure a lewd time

Afraid that Amanda might suggest to use it for boring stuff, or even not daring to use it at all, Amy decides to add some rules for assurance.

New Rule: The one that first picks up the rulebook becomes the owner of the rulebook, anyone the picks it up after that becomes a co-author.
A co-author may write rules, but may not read rules that have been added before they picked up the book, nor rules that have "Hidden" at the start. The owner can recall the rulebook when they want. Co-authors can notice the changes brought by the rules, unless they are marked as "Hidden".

New Rule: Rules that are added must in some way humiliate or dominate the owner in a way that they find arousing. If a rule are added that does not fulfill this requirement, it is adjusted to make sure that it does, or if that is not possible, the rulebook will add an additional rule to compensate, with the severity equal to the impact of the non-conforming rule. In addition, the owner would be forced to write a rule to fulfill a sexual fantasy of theirs, as they did not ensure that the rules were followed. No rule added or modified this way may be removed in any way. After a violation of this rule, the instruction for how this rule work is provided through the rulebook.

Wriggling awkwardly in her seat, and trying but failing to suppress her arousal makes Amy realize that she might need to change her panties when she get home. But that can't stop Amy from grinning wickedly at the masterpiece rule.

With a shudder of delight, she realizes that the rule would also apply to her. She obviously would have to try it out!