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Sisterly love!

Jessica and Ashlee Simpson dined at BLT Steak at the Ritz-Carlton in Charlotte, N.C., over the weekend.

The sisters were in town to promote Jessica’s fashion line at Charlotte’s Southpark Mall with the help of her daughter, Maxwell.

Jessica, who is expecting her second child with fiancé Eric Johnson, this summer, wore a black tank and black pants with studded black heels. Both girls ordered the same dishes for dinner; a filet and a slice of peanut butter mousse cake for dessert.

“Both sisters were in a great mood. They were very sweet,” an onlooker tells PEOPLE. “They were with their entire family – including the kids.”

– Jennifer Garcia