I think Abel is actually not Eve's son, but Lilith's son. And thus, is Charlie's older half-brother. And Lilith is in Heaven to keep an eye on him. Maybe Abel is naught but a happy go lucky manchild who's even more sheltered then Charlie.
So they said FUCK ME GENTLY WITH A CHAINSAW and then boom! (Wait that makes sense) brotha then Eve would’ve given birth to both Cain and Abel which means Adam is like the big dickmaster that is a goddamn stepdad to Charlie (cus of Lilith) while being Cain and Abel’s father (cus of Eve)