Denny was stood by Reciprocal IVF. Hen was his ”genetic mother” (the one whose eggs are removed from the ovaries, fertilized in a laboratory, and resulting an embryos), while Eva was his ”pregnancy mother”, (the one in which uterus are placed partner's eggs, making an embryos, to create a pregnancy). After Eva was arrested, Hen married Karen, who became his stepmother.
Currently, Eva is filing for custody of Denny, because she thinks that having Denny will make Hen come back to her. She also thinks that she and Hen will make a better family than Hen and Karen did because she is envious of their life.