Two years after Heather Clark’s son’s tragic death in 2013, she was able to hear her son’s heart beat again with a stethoscope pressed to the chest of 4-year-old Jordan Drake. The little girl received the heart of Clark’s son.

“The sound was so strong,” Clark, 25, tells People. “I could feel him there with me. He is continuing on through her, no doubt.”

The two families recently gathered with the donor network of Arizona at Phoenix Children’s Hospital to meet each other for the first time since the tragedy and the life-saving surgery.

Clark talked about her decision to donate her son’s organs to Fox Phoenix. She said, “There is another family out there, somewhere, you know who’s feeling something of what I’m feeling, somewhat, and I have the chance to make them not go through what I’m about to go through.”

She said, “There is another family out there, somewhere, you know who’s feeling something of what I’m feeling, somewhat, and I have the chance to make them not go through what I’m about to go through.”

Clark made that brave decision to donate her son Lukas’ organs after he tragically passed away in June 2013.

“He was just so outgoing, he was just a little ham,” said Clark. “If there was a camera in front of him he was either smiling or sticking his tongue out.”

Clark says Lukas, a miracle baby for a first-time mother, saved three lives with his organ donation.

On the other end of the tragedy is a miracle, Drake, who was born with a heart condition, called mitral valve regurgitation. She was only 15 months old when doctors told her family she would need a heart transplant in 2013.

“We were so scared,” the mother of Jordan, Esther Gonzalez, tells People. “We thought she would never get a heart.”

The mother says they ended up waiting only one month before receiving news of Lukas’ organs.

“Heather was going through the most pain and sadness of her life and she was brave and selfless to think of others at that time,” she says. “She made that insanely hard decision, and we are so thankful to her and her son.”

USAToday reports that Lukas was only 7 months old when he mysteriously died with a babysitter. The matter is still under police investigation.