Is it wrong to masterbate when you are satisfied sexually by a spouse?

No, it's not! There's no right or wrong, when it comes to sex, with some rare exceptions, legally speaking. One thing doesn't rule out the other! Why should you deny yourself the pleasures of self-indulgence, just because your partner does everything you can possibly imagine only to satisfy you?! Besides, your partner won't always be around. Wait until you're alone. Then, you can do whatever you want.