Sounds urgent to me!
My strategies are:
1) Do not complain when she gets a new cat, but tell her that you are now owed a new snake (warning: this only works if your wife is a Crazy Cat Lady!).
2) Keep the snakes in your man-cave, which women cannot enter due to not being able to make their way past the litter of empty cans, the stacks of books conveniently placed on the floor where you can reach them without abandoning your beer, and similar effluvia suggesting a male presence. Then, when your wife starts complaining about the man-cave, tell her you'll clean it up if you can have a new snake. Then you can show her the one you got six months ago and kept in your man-cave so that she never figured out it was there to begin with.
3) Or you could try logic, observing how little trouble and mess snakes actually are to keep, and how it will in no way impinge on her life to have another one in the house.
However, if you want a truly delightful and friendly species of moderate size that will also be a talking point and is fun to watch (diurnalish, loves to climb), I would recommend the Aesculapian.