“THIS WAS SUPPOSED TO BE THEIR MIRACLE BABY…” After years of heartbreak, treatments, and failed IVF attempts, one couple finally welcomed the child they had dreamed of for so long. Then came the phone call that changed everything: the baby they had been raising wasn’t biologically theirs.

The Florida couple at the center of an IVF mix-up have vowed to remain their baby girl’s “permanent” parents after hammering out an agreement with her biological parents. Tiffany…