Board Thread:Naruto Gaiden/@comment-25549954-20150527164334/@comment-25402783-20150531220919

She doesn't. Look at the other panels. It's just the angle and Naruto states became Hokage around chapter 700.

Personally I think she was pregnant in that flashback. But the whole thing about Naruto not being Hokage untill after Bolt's birth is a little fuzzy. For one we don't really know when Naruto became Hokage, two it could just be a continuity error on Kishi's part, there a lot of those in comics, looking your way DC and Marvel!