You'd do anything to stay out of jail. But if that's the kind of pay the guard wanted, the perpetrator has to do his best. And so this guy fucked her well, fucked her in all positions, so that the guard herself has wanted to taste his cock. And the ending on her belly completed the payoff. All debts had been paid. Here comes the long-awaited freedom.
That the sister is interested in her foster brother's opinion is commendable. And assessing her worthiness from a man's point of view he can. But asking him to jerk off in front of her is kind of weird. He's going to get her, isn't he? Only this slutty girl is not scared at all - that's exactly what she wants. He ended up flushing a whole puddle on her tummy! Drove it.
This is one of those cases where you can't tell if someone is taking advantage of someone else. Both the brunette and the guy both have a villa, so while having sex, they're really having sex, not fitting in with each other. It's worth noting the brunette's beauty, good model looks.