Either this half-sister is a slut or it's not the first time she's fucked her brother. Look how calmly she reacts to his appearance. And even though his dick isn't the healthiest, he's always around and she sucks it with pleasure. And judging from the video, the girl likes to be licked there. She even shudders when his tongue touches her clit. Yes, and with his fingers he helps her catch up before he comes inside her. It's nice to live with such an available sister!
This guy can't handle his finances, and he can't properly protect his girl. He sent her to a nigger to pay his debts, and he didn't even know there would be two of them. And he himself was left on the doorstep for nothing. The girl, of course, was given a proper reception and spanked in two barrels, but the debt must be repaid, and she had no choice but to satisfy both of them. She did it perfectly.
That's a good ass-whuppin'.