Well I definitely want to take this challenge, though I had a different idea for how to go about it. Don't worry though, it includes all of your requirements: hung draco, stacked Hope, sub Hope, lots-of-cum draco, dirty talk, public sex, rough sex, Hope cheating on boyfriend/husband.
Just...I'm not completely following any of your ideas on here. XD
Basically, the idea is that Fem! Harry is married to Ron Weasley. Unfortunately, Ron isn't exactly packing heat, nor does he seem to know how to use what he's got. So Fem Harry (Hope) is quite frustrated. Then a Magical conference is being called and England has to send their Ambassador, Draco Malfoy there to represent them, of course who would be a better bodyguard than THE Hope Potter? So sexually frustrated Hope, who has never experienced an orgasm (by Ron anyway, seeing as Toys don't count...and boy has she used those toys) is tempted by her old schoolyard rival. Of course, Draco uses her obvious frustration against her and well I'm sure you can guess where it goes from here.
I just want to run this idea by you and see if you would be interested in accepting it as an answer to your challenge, since I've already started working it on it as I type this. XD Just let me know!