Expanding on this...
MC=Mother Emily, father is named Santiago, the father is responsible for his Latino looks and he's suppoused to look a lot like him.
Erynn=Mother Melissa, father a tall, blonde guy with tatoos... there's one strong possibility here(or a sudden asspull just to surprise people).
Alexis= Adrianna is her biological mother, when she has the "use protection" talk with Layla she reminds her that she got preggo with Alexis at 18 years old to reinforce that she should "cover up" with the MC.
No such info on Layla or if the guy who lives at their house is their biological father, but it seems more likely the case.
Iris= Daughter of John(most likely biological), mother never brought up... since he dated her for 2 years already the MC might know things we don't and he doesn't need to ask "where is your mother?" now.
Elena=Mother Ava, father absent.
Val= Mother yet to be named(moves towns often), father not yet mentioned.
Nikki and Cara= We have met both parents and have the full backstory of this family, unbelievable!!!!!
Nyx does love family trouble huh.
That's highly unlikely, one of the options brought up to help Erynn was Alexis dad(who she says has a soft spot for Erynn), they shoot it down because he is famous, but Erynn is receptive to the idea of doing this with him.
She probably wouldn't be happy hearing the suggestion had he hired her services just a couple of weeks back.