Having someone agree with you about something does not mean you asked for, nor required, their permission. It -does- mean you went and spoke to them first so they knew what to expect, that you gave them room to give their opinion on the decision, and that you went into it with the desire to find a mutually beneficial arrangement in the event they disagreed with it rather than just "Wife! I have decided!"

No, it's normal in a relationship, especially for something you'd do 3 months.