I'm going to write in third person as well.

Cass noticed that Jetta had entered the superstore. I wonder what Jetta is doing. As soon as the last costumer left, Cass ran after Jetta to see what was up with her. "Jetta? What are you doing holding those?! Don't tell me that... no." As Cass spoke, she just stared at Jetta. She couldn't believe what she saw in her hands. "Who's the father? You better start explaining things right now."