Just one room for the two of us? Aha! You did have a perverted plan after all!
So, in this case "perverted" is the adjective form of "pervert":
nounˈpəːvəːt/1.a person whose sexual behaviour is regarded as abnormal and unacceptable.
But then I checked on Google Books, and realized that there's not only one result for my phrase, but the phrase has a different meaning:
"She and her husband had a perverted plan to spread cannibalism to others."
Source: Google Books.
Is my usage uncommon? If so, what's a better option?