Caught in the Act

Inside Kim & Khloé's Whirlwind Dallas Day

01/09/2012 at 06:00 AM EST

Kim and Khloé Kardashian shared lots of sisterly bonding – and reality show filming – in Dallas. The two started their day with lunch at Palomino downtown with cameras following them. "They wanted it to be kind of low-key," a source at the restaurant tells us.

After their meal, they headed to Stanley Korshak, an upscale department store, for some shopping. A source at the store called their visit a "fun surprise. They're lovely, and we really enjoyed having them in the store."

Next up: a stop at the Dallas World Aquarium, where Khloé posed near the leopard exhibit.

The sister ended their evening at the Dallas Mavericks game, where Lamar Odom scored a season high 15 points against the Phoenix Suns. – Darla Atlas

NEXT: Kelly Clarkson & Miranda Lambert Meet Up for Dinner with Pals