Here’s what you’ll learn when you read this story: Accused serial killer Rex Heuermann shares two children with his ex-wife, Asa Ellerup. Ellerup and the couple’s daughter, Victoria, opened up about the family and their life since Heuermann’s arrest in a Peacock documentary. They say Heuermann’s alleged crimes don’t fit with the father and husband they knew. According to his ex-wife and daughter, Rex Heuermann was a devoted and protective family man. Almost three years after his arrest, they have continued to grapple with prosecutors’ claims that he secretly led another life as the Gilgo Beach killer. Heuermann is accused of killing seven women who disappeared on Long Island from 1993 through 2010. He has previously denied any wrongdoing, but according to reports could change his plea at his next court appearance on Wednesday, April 8.…