The affectionate pair showed up at Suite, an exclusive nightspot, to celebrate Romo's 28th birthday a few days early. (His actual birthday is Monday, April 21.)
The get-together included a blue, star-shaped, No. 9 birthday cake – a nod to the Dallas Cowboys star's jersey number – champagne, and lots of dancing at the crowded club.
At one point in the evening, Simpson got on the mic and sang "Happy Birthday" to her beau – then they started feeding each other cake. (See more pics from the feeding here.)
"She licked cake from his face as everyone cheered them on. It was quite a spectacle," says one club insider. "But they looked really happy together. Jessica had blue icing all over her hands and mouth and Tony was laughing."
On Sunday, the inseparable pair were spotted at Bent Tree Country Club where Romo teed off to play 18 rounds. Simpson watched from the sidelines, riding along in a golf cart.
– Kelly Rondeau