Jessica Simpson has sparked rumors that she expecting her first child with BF Tony Romo after the “Come On Over” singer was photographed with a supposed baby bump at her twenty-eighth birthday party in Sherman Oaks, California last week.

“She definitely looked bigger than she usually does, and her breasts seemed to have swollen too,” an onlooker says. “She also kept holding a grey jumper in front of her stomach, as if she was trying to hide something.”

Jessica’s younger sister Ashlee will welcome her first child with husband Pete Wentz this October.