Beau later adapted the caption to add, "No idea why I put my hand on her stomach for the photo. It looks weird. She isn’t pregnant. Just to clear that up.
"But it was a great dinner as always. But no, Kara isn’t pregnant. I mean it would be great if she was but she definitely isn’t. I’ll stop now. Anyway, enjoy your weekend fam xx"
Fans couldn't help but laugh at Beau's "announcement."
One fan wrote, "Aww best announcement ever! Congrats guys."
Another echoed, "This is amazing news! Can’t wait to meet to beautiful bundle of sashimi!"
Beau and Kara share daughter Remy, 5, and son Jesse, 1.