Although the pandemic has put graduation ceremonies on hold, Charlene reminds Atasha and Andres that the setback doesn't make their achievement less special.
The proud mom writes in her Instagram post, "We are extremely proud of you! All the years of hard work has paid off. Congratulations on your high school graduation.
"You may have not physically walked across the stage for the graduation ceremony due to the global pandemic, it does not take away the many years of sacrifice, perseverance, defeats, victories, and life lessons you've learned and continue to learn during your school life and life in general."
Speaking on behalf of husband Aga as well, the former Miss Universe candidate praises the twins for their kindness and God-fearing qualities.
As parents, she says, they celebrate their children every day and are "extremely excited for what life has in store for the both of you."
Charlene adds an inspirational message to her 18-year-old twins, telling them to "continue dreaming and reaching for your dreams and putting God first in all your plans and he will lead your path We love you so so so so much!!!"
Charlene ends her post with a shout-out to the 2020 graduates: "To all the 2020 graduates...you belong to a special graduation batch that will be forever remembered for their courage, resilience, and strength.
"Congratulations to you all and continue to inspire and be inspired."