Though it seems to start as a love/hate relationship, Dudley and Kitty's relationship began to soften as they warmed up to one another. During T.U.F.F. Puppy's run, this led to many rumors that Dudley and Kitty's relationship was bordering on that of romance. Although these rumors are mostly false, the pairing has remained a mainstay among the show's following.
On a stream done by Hartman in December of 2017, he stated that he personally viewed them having more of a brother-sister relationship instead of a romantic relationship, albeit recognizing the romantic aspects of the pairing. 
- Kudley, a term for the pairing which is popular among fans, is a homophone of the word "cuddly".