Sister is so exhausted after a long day, she decides to take a nap on her brother's lap. Unaware that he's getting aroused, he begins to caress her beautiful breasts. But what he doesn't know is that she's already awake. When he starts fucking her behind her back, she's struck by surprise, yet silently sucks his hard boner before obediently taking his cum deep down her throat. Enjoy this hot incestuous scene!