Two baby twins are about to meet their grandfather, but he’s not your average granddad. Michael Rubino is America’s most famous sperm donor. Over the years he fathered 24 children. Inside Edition was there when Michael came together with 19 of the children he fathered. Now, he’s meeting two of his grandchildren, the twins of 20-year-old Rachel, whose mother used Michael’s donation to conceive her. Rachel and her husband Spencer flew to Los Angeles to introduce their kids to grandpa Michael.