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.
And the lady's very experienced, I see. She fucks with pleasure, her anus is clearly developed and she is used to sucking dick. An early young woman and as they say without complexes. I wonder why she does not fuck her daddy, he could give her more money for sex. Or does he have no energy left after the same temperamental mother? Either way, it's interesting.