Having an incompatable penis and vagina would be extremely sad for me. I get where you are coming from with respect to the emotional disconnect. Not being able to experience the connection I do with "satisfying" vaginal intercourse...especially because she is being bored out by a massive dick... would make me loose all interest in sharing intimacy I would imagine. I'm all or nothing unless there is a medical reason besides massive stretching.
Good luck....I'll sit back and wait for the flames now