Carlos Morales gazes lovingly at his four newborns, who are not even 2 months old, and can't help but have a huge smile despite the tragic circumstances.
"Look at these beautiful blessings," he tells PEOPLE in the living room of his Phoenix, Arizona, home. "Even when they scream their heads off I want to give them the biggest kiss."
Nearly two months after his wife Erica's death in childbirth on Jan. 16, Carlos, 29, finally brought home their remaining two babies who had been in the hospital until this week.
Erica, 36, died just a few hours after giving birth to the quadruplets. It was supposed to be the storybook happy ending to the couple's years-long struggle to conceive. Finally, after successful IVF, she became pregnant with quadruplets.
She died after she went into hypovolemic shock, an emergency condition involving severe blood loss.
At HomeA Twins baseball game plays faintly in the background, but as soon as a baby cries, Carlos immediately knows who it is: one of the three girls, Tracy, Paisley, Erica, or the boy, Carlos Jr.
"I already know their quirky little habits or the next time they're going to cry," he says. "They're starting to form their own personalities."
Until Wednesday, only Carlos Jr. and Tracy were home. Now, Erica and Paisley have joined the family.
"I thought two was hard," Carlos says laughing, "But now that I have four, two seems easy!"
Their friend Nicole Todman created a GoFundMe page where people can donate to the family. It has raised almost $350,000.
"I am so blown away by how kind people are to donate," Carlos says. "It's unbelievable."
Carlos looks like a natural, tending to crying Erica, who was named after her mother, while calming Carlos Jr. down at the same time, but he admits that this was never the plan.
"Erica was supposed to be here. We were supposed to do this together," he says. "She was so prepared for this. She even wrote down in her iPad every single thing she had to make sure she had to do to have a healthy pregnancy."
Although Erica is gone, she is present throughout every inch of the house. Portraits of her and Carlos sit on counter tops, and photo albums are out in the open.
Carlos isn't going to raise his four children on his own. His mother-in-law, Sondra Elaine Bridges, has moved in and is right by his side every step of the way.
"I made a vow to Erica before she passed that I would move here and help them for a few years," she tells PEOPLE while feeding Carlos Jr. "I don't plan on leaving. These babies are going to have an amazing life and always know how much their mother Erica loves them."