Did Walker Hayes Just Make a Huge Announcement on Instagram?

It seems like he revealed some pretty big news on Instagram...or did people know this already? He posted this picture of he and his wife but said, "all 3 of us had so much fun"...THREE! His wife is pregnant. Then he hashtagged 7....or was just using the hashtag as a number sign, ya know, it's intended purpose, to say they're having baby number seven!!!