Step brother's daring attempt to pleasure his teen sister in the shower

In a daring move, two step brothers decide to share more than just their living space. While one is taking a shower, his friend dares him to pleasure his teen sister. The guy hesitates at first, but then gives in to the temptation. He starts by gently washing her back, which leads to him exploring her curves with his hands and tongue. His friend joins in, helping him out with some naughty moves. The sister gets turned on and reciprocates by touching him. They move to the bed where she takes control, riding him passionately. Her friend watches approvingly as they get lost in each other. The guy keeps going even after he's spent, not minding the mess. This steamy encounter leaves them all satisfied, with the friend even getting a taste of the action.