Earlier that day, their mom Charlene Gonzalez had her swollen appendix removed through a surgical procedure called laparoscopic appendectomy.
Charlene had the surgery as soon as she found out she had appendicitis.
Surrounded by her husband Aga Muhlach and their twins, Charlene is fast recovering from her surgery.
In an Instagram post on the night after her operation, the 45-year-old former beauty queen thanked everyone involved in her surgery and those who took care of her after the procedure.
Charlene wrote, "Thank you St. Luke's Q.C. Hospital under the care of our family doctor internist, Dra. Ubungen.
"I went in for a check-up for pain in the right lower abdomen, hip area.
"My blood test were normal but my CT Scan showed otherwise.
"I had appendicitis and needed immediate surgery the same day to remove my appendix to prevent rupture.
"Thank you to my anesthesiologists Dra. Ruiz & my surgeon Dr. Amado for the care and painless surgery who performed a laparoscopic appendectomy..
"Plus, all the kind nurses who took care of me."
The operation was the reason the Muhlach family celebrated the twins' birthday in the hospital.
Charlene said in her post, "thank you to my family for your endless love & for keeping me company in the hospital.. my mom, @agamuhlach & for Andres @aagupy & @atashamuhlach_ to spend their 18th birthday with me there and keep me company I love you all so much
"Here's to a fast & swift recovery #i'mdoingwellnow #onmywayhome to rest & recover"
In a separate post, Charlene wrote a birthday message to Atasha and Andres, "The loves of my life.
"I thank God every day for blessing me with wonderful & kind-hearted children like you Ate & Kuya.
"Thank you for bringing your dad & I so much love & happiness through the years... I can not believe your 18 now...It's your turn to fly.
"Your dad & I will forever be your biggest fans. Always remember to continue to be kind as you are and give all glory to God in everything you do...
"#Happy18thbirthday @aagupy @atashamuhlach_"
Charlene was not able to attend the premiere night of the movie Nuuk, which stars her husband and Alice Dixson, for the same reason.
She said, "Unfortunately, I was not able to attend the Nuuk premiere, which I was so looking forward to watch, I will watch it during the regular screening."