I wish your assertiveness (to your W) was as great as your sense of humor.
Yes, she does tend to treat you like a child, but why is that? Looking in from the outside, you're allowing it. You said yourself, you're a great husband and father... who deserves some love and affection. Stand your ground this time. Don't let her bully you into laying low again for her comfort! She's not going to "get it" as long as you keep allowing her to get comfortable and you continue biting your tongue.