The 30-year-old - who is about six or seven months along - showed off her blossoming bump in a bright purple jumper which she paired with loose, patterned trousers.
But the focal point of the snazzy outfit was her footwear – towering blue suede platform heels – which she accesorised with a Chanel bag.
The couple, who stepped out for a bite to eat at Madeos Italian restaurant in London, are already parents to one-year-old Rafael.
He was born in September 2011, but his name was kept under wraps until July, when the couple revealed they were going to add to their family again.
Jacqui confirmed the little one's moniker when she attended the Dark Knight Rises premiere with her famous other half.
She told reporters the baby is lavished with attention by his big brothers, Rocco, 11 and six-year-old David – Guy's children from his relationship with ex-wife Madonna.
"The two big boys, they absolutely dote on Rafael. They're always dancing with him and wanting to play with him," she said.