To me, there is little difference between you getting all hot and bothered over a playboy and then hopping into bed with her and jumping her bones. Something tells me she'd be highly offended at that scenario.
My philosophy is that I want H's sexual energies to be inspired by and directed towards me, and vice versa. Now I know that we are all sexual beings and not every ounce of his sexual energy will be inspired by me, but I am talkin in general here.
However, I think you might be able to tap into this. If she is turned on by reading erotica, then why not write her a story of your own? I think you have some great potential here in that she obviously HAS a sex drive but has trouble accessing it within the confines of marriage.