Kate Gosselin celebrated her 40th birthday with her children and couldn't be happier that ex-husband Jon isn't in her life anymore.

The "Kate Plus 8," reality star turned 40 way back in March, but the big day is finally airing tonight on the new show for the world to see, Us Weekly reports.

In the episode, fans will get to see her birthday getaway to Mexico with her eight children and her best friend. They stayed at the Karisma Hotels & Resorts Generations Riviera Maya and Kate had the perfect mix of relaxing downtime and family time.

Kate used to be the star of the reality show "Jon and Kate Plus 8," but the two went through a very painful and public divorce in 2009 after ten years of marriage, PEOPLE reported at the time. 

The two are currently involved in a heated custody battle over their 11-year-old daughter Hannah, but Kate put that all aside while she enjoyed some quality time with her children in Mexico.

In an exclusive clip of tonight's episode obtained by PEOPLE, Kate opens up to her best friend about her goals and how she's handling life after divorce.

"The greatest five years of my life," Gosselin says of the time after her divorce. "My goals haven't changed in terms of my kids. My ideas haven't changed, my parenting hasn't changed. I'm just doing it alone now."

She may be alone now, but Gosselin is completely fine with that. However, she is not fine with  people asking about her dating life.

"I want people to stop asking me if I'm dating," she continues to say. "I would like that to end. Don't they realize that after five years it offends me, it annoys me? And it's a reminder that here I am, it's just me."

Watch the sneak peek below and catch the full "BIG Four Oh!" episode of "Kate Plus 8" tonight at 10 p.m. ET on TLC.