Carrie DeKlyen is hours away from dying — but her final, selfless act to forego cancer treatment and carry her baby to term will “never be forgotten” says her husband.

“When our daughter gets old enough, I’ll tell her the story about her brave mommy,” Nick DeKlyen tells PEOPLE through tears. “I’ll tell her that God gave her the gift of life with an awesome plan in mind and we’re not sure why mommy had to be sick and pass away to do so, but it’s all a special plan and we must trust it.

“I’ll tell her that mommy did this because she loves you and she is in Heaven and we’ll see…