She gives him a smalltit titty fuck, then indulges in just a few licks as Brad watches. Soon she's deep throating his hardon. Her hands and mouth leave Brad hard as a rock, so Mackenzie takes the opportunity to strip down and climb aboard his fuck stick. Her bald pussy is nice and tight as she slides down on her stepbrother's erection and starts riding him. Now that he's had a tastes of his stepsis, Brad is much more willing to play along. He gets Mackenzie on her hands and knees so he can pound her doggy style while spanking her firm ass until she cums. Mackenzie isn't a one and done kind of girl, so she rolls onto her back and spre her thighs for Brad to keep going. He resumes banging his hot sis as she encourages him to keep it up. As Brad gets ready to cum, Mackenzie pulls him close and keeps him buried inside so that he creampies her and perhaps gives her the baby she's hoping for.