Unless you're unabashed about pulling out your boob in front of visitors, make or buy a nursing cover. You'll use it. Frequently. New babies nurse all the time.
One of our favorites is from Milk Snob. It's super soft and stretchy and works as a nursing cover, as well as a cover for shopping carts, high chairs, and infant car seats too. The confetti print is part of the brand's current collaboration with Oh Joy! for Target.com.