My desire did this, too, after having finished PM.
In fact, my H accused me of making the whole thing up...about wanting more sex in our lives! It took me about a month to really process what the new Honey would act like and how she would proceed in the relationship, etc. Once I formulated that and H started to come around to the plan of having more sex, my desire naturally started to come back. I would say it took about a month or so for me, YMMV as Hairy likes to say.
