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Kim Zolciak-Biermann Celebrates Son Kash's Birthday with a Touching Message

The #DontBeTardy mom sends love to her four-year-old "superman."

By Jocelyn Vena Aug 17, 2016, 11:40 AM ET

Kim Zolciak-Biermann Reacts to Kroy's Move to the Buffalo Bills

Things are definitely busy in the Zolciak-Biermann household this week. Between Kroy heading up to Buffalo to play for the Bills and school being back in session, Kim Zolciak-Biermann has a lot on her plate. Which might explain why it took her an extra day or two to post a touching birthday message to her son, Kash, who turned 4 on Monday.

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"My sweet Kashew turned 4 on Monday, and with all the craziness I never posted this!! Happy Birthday to one of the sweetest, most caring little boys I have ever met," the Don't Be Tardy mom shared on Wednesday on Instagram, alongside a video montage of some of his cutest moments. "He told me 'he is my superman til daddy comes home.'"

My sweet Kashew turned 4 on Monday, and with all the craziness I never posted this!! Happy Birthday to one of the sweetest, most caring little boys I have ever met ð he told me "he is my superman til daddy comes home" â¤ï¸â¤ï¸
A video posted by Kim Zolciak-Biermann (@kimzolciakbiermann) on Aug 17, 2016 at 4:53am PDT

On Tuesday, Kim opened up exclusively to The Daily Dish about Kroy's new gig with the Buffalo Bills, offering up an update on how her family is handling his big move. (There have been some tears, to say the least.)

"Today has been quite emotional day for me and our children and my husband. So excited to sign with Buffalo. My family's actually from there. My parents grew up there. My aunts still live there. The fan base in Buffalo is like no other and the coaches and team is incredible, so I know that my husband is super excited to join the family," she said, in the video above. "I am super excited for him, but I've never been without Kroy for more than two days, aside from his trip to London a couple years ago. And our kids are not used to being without him either. So he's the calm in our storm. So it's definitely been a trying day. I think I've cried probably out of the last 24 hours, probably 23 and a half. But there's nothing that we can't get through. It's strange not being able to just pack up and go because KJ is in kindergarten and Kash is in pre-k, so there's nothing that the Biermanns can't get through. And we, of course, are Kroy's biggest fans. So I will see you guys in Buffalo."

And don't forget, Don't Be Tardy's Season 5 premieres on September 14 at 10/9c. Check out a preview, below.