Ever since Whitney, Carlin and Erin have started their online dress business, it's been non-stop! They've been selling out of dresses and staying up all hours to ship out packages! Given their rapid expansion, the ladies are working on moving into a new work space. Meanwhile, Katie puts her cosmetology skills to the test when Michaella stops by for highlights. As the sisters catch up, Katie reveals that she has a crush on a new guy! Now that Erin's expecting baby #4, she heads to the doctor for an ultrasound. How will Erin and Chad juggle all of their work responsibilities with another baby in the mix? And it wouldn't be a Bates family cookout without a family member revealing some big news! Will Carlin and Evan's pinata surprise be a baby bombshell?!