>>5778485I believe it is stated they are. No info on what happened to to mom, besides they didn't know her. Other anons have speculated she may have passed away giving birth to Apollo. I assumed her referring to the guy who got pulped as a caretaker was her realizing someone who tried to molest her and possible succeeded in the past was not a person to call "dad".
This might have been a foster parent, though. Maybe their actual dad packed up and left. It is unclear.