A 24-year-old woman set to give birth early next week lost her hardhat hubby in the deadly Brooklyn building collapse — and can’t find it in her heart yet to tell their 4-year-old son that Daddy is dead.

Nataly Magaly Llumitasig heartbreakingly described to The Post on Friday the moment she learned of the death of 26-year-old husband Jose Luis Caguana Cosquillo — who she said was over the moon about the upcoming birth of their second child.

“He was so excited about the baby. He would say, ‘Oh my God, my baby is coming,’ ” Llumitasag said.

“His friend from work called me and said there was an accident. He said my husband was not breathing,” the young wife recalled.

“I went straight to the hospital. He had already passed away.

“I saw him. I was crying. I touched his face. I told him, ‘I love you, I’m going to miss you a lot,’ ” Llumitasig said.

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“Right now my heart is broken.”

Llumitasig — who immigrated to the US from Ecuador a decade ago and married Cosquilla after he immigrated six years ago — said she doesn’t know how to tell their 4-year-old son, Nathan, that his father died.

“My son doesn’t know nothing. I don’t know how to tell him. I’m going to ask the school counselor how to tell him,” Llumitasig said.

The woman’s husband was among eight people killed when  the three-story Flatbush building shockingly collapsed into a construction site on Wednesday.

This is a developing story. Please check back for updates.