Don't look at me. I stopped watching regularly in 2015 until earlier this year (and have since stopped). All I know is that Nina gave birth in her coma(?), I think, to what she thought was one child but turned out to be twins.
I believe they knew in Stafford's early days she had been pregnant but assumed she'd lost it when she ODed on pills after finding out about Silas' affair with Ava (which I think Donna Mills masterminded), and went into her decades-long coma. That's why I suspected from the beginning that RC had intended Kiki to actually be Nina's - Donna Mills/Madeline was willing to risk Nina's life to keep her from having Silas' child, as she hated Silas. I assumed Madeline had passed the child off to Ava to keep Silas out of her daughter's life.
Regardless, the saga of Nina's long-lost child/children went on for around a decade and I've never cared in the slightest, except for when it resulted in the Nina/Drew/Willow triangle which I've lost interest in with PM gone.
I am not going to come out here calling Kate Mansi the c-word for people on the Internet being crazy. A lot of Soap Twitter is weird as hell. They act like all these mid couples and characters on GH now are super popular.