In between the sweet moments was a video of Thompson and her son sharing a mother-son dance at the wedding. Best of all? It was a dance to a song written by Thompson herself.
"As a mom, I have always hoped that my sons would find the girl of their dreams, fall in love, & create a family together. @brodyjenner & @tiablanco completed that vision on Saturday, July 12!" she wrote in the caption.
"The mother/son dance was to a song I wrote for Brandon and Brody - with the lyrics expressing the love and devotion I feel for them. It couldn't have been more perfect," the caption continued.
In the clip, Thompson, wearing a green dress, and her son in his groom attire, were seen slow dancing to the song as a crowd gathered around them. The moment was a special one for several reasons.
"Honey [Honey Raye Jenner -- the newlyweds' daughter, born in July 2023] probably had more fun than anyone there - which is saying a lot because it was such a beautiful wedding and a fun celebration. Tia was a gorgeous bride, standing with her handsome groom, surrounded by only the closest friends and family," Thompson wrote in the caption.
Blanco also explained how important Honey was during the ceremony in an exclusive interview with PEOPLE. The wedding even had a "Sweet as Honey" theme inspired by their daughter.
"I truly couldn't imagine our special day without Honey," she said. "She is the light of our lives, and her presence made everything even more meaningful and unforgettable."
Honey also had the "time of her life on the dance floor -- beaming with joy and soaking in every moment," Blanco said. "From standing beside us during our vows to twirling around us during our first dance, she was part of it all, making the day even more magical."
Thompson ended her post by sharing lyrics from the song that express the "many wonderful things" she wishes for her son and his wife, "now and in the future."
Blanco wrote in the comments, "Awww love all these moments! What a day! The most perfect intimate moments with honey being the star of the show! The best day! Love you!"
Jenner and Blanco got engaged in June 2023 at their baby shower. The proposal came five months after the couple confirmed they were expecting a baby together.