Ruby is showing promise.
She’s gorgeous and she’s smart. Diablos wants her to himself.
He offers her a deal. Take over the club from Rimmon, and give up her daughter for adoption.
He’ll ensure her safekeeping until she pays off her debt.
He freezes her in time. She will be forever beautiful and young, exactly as she is now. Exactly as he lusts after her.
Work hard, pay off the club and when she’s free she can reunite with her daughter. Mess up and he gets her soul and her for eternity.