Kyle Busch’s widow shared a heartbreaking tribute to the late NASCAR driver on Father’s Day in a post on Instagram describing the struggle the family had “trying to figure out how to navigate a day that should be filled with so much joy.”

Samantha Busch posted the heartfelt words and a montage of videos of Kyle with the couple’s two kids, 11-year-old Brexton and 4-year-old Lennix.

Kyle, 41, died one month ago to the day on Father’s Day from complications of severe pneumonia that progressed into sepsis. His passing was a shock to the motor sports community and to his family.

“This still doesn’t feel real at all,” Samantha wrote in her tribute. “I was up all night thinking about what today should have looked like for Kyle and the kids. The Father’s Day cards that were already made, sitting in a drawer with no one to give them to. Trying to figure out how to navigate a day that should be filled with so much joy for them.

“He was the dad who never missed a chance to be silly, race the kids around the neighborhood, wrap them in his arms, or stay up a little longer for one more book, one more question, one more moment.”

Samantha wrote that there was nothing that made Kyle “prouder” than being a dad to their two kids.

The montage video was filled with moments with his kids, from racing his son Brexton to the water while at the beach to walking down pit lane with his daughter Lennix.

“Watching these memories hurts more than I can explain, but they also remind me how lucky we were to have him,” Samantha continued in the post.

“Kyle, the kids and I miss you every second of every day. Our hearts ache for you, but it’s more than that. Your absence is something we physically feel. Our bodies hurt from missing you, from reaching for someone who isn’t there, from loving someone we can’t hold anymore.

“I will keep telling your stories, sharing your laughs, and making sure Brexton and Lennix always know just how deeply they were loved by their dad.”

Samantha ended the post by wishing Kyle a happy Father’s Day and writing that, they “love you and miss you more than words can say.”