In the “The BIG Four-Oh” sneak peek, Kate and her children, 14-year-old twins Mady and Cara, and 11-year-old sextuplets Leah, Collin, Aaden, Joel, Alexis and Hannah, have some fun in the sun on the beach, a birthday bash for mom, and let her have a little grown-up time with her best friend to dish about dating and divorce.
"I've been divorced for five years," she tells her friend in the clip. "It's been the greatest five years of my life."
Kate, who split from Jon Gosselin in 2009, also explained that since being divorced, her parenting style hasn't changed.
"My goals haven't changed in terms of raising my kids. My ideas haven't changed," she added, "I'm just doing it alone now."
One of her goals: "I want my kids to grow up and be each other's best friends."
The special “Kate Plus 8” airs at 10 p.m. ET tonight on TLC.