06/20/2012 at 01:00 PM EDT
Three words: One. Hot. Mama.
Pregnancy is clearly agreeing with Vanessa Lachey
, who posted a photo of herself – highlighting her growing baby bump – in an infinity pool at sunset.
"Thanks for sharing all your Beautiful baby bumps & embracing your bodies!" Lachey, 31, Tweeted Tuesday
. "As promised, here's one @NickSLachey took."
Her photographer, husband Nick Lachey
, 38, is also clearly enamored
of his expectant subject.
"Watching your wife go through the phases of pregnancy is the most surreal, beautiful thing ever," the dad-to-be
Tweeted last week
. "Nothing like seeing life evolve....."
The couple's first child is due in September.