Brother Felix is finally in bed relaxing watching some porn. Unexpectedly, his little sister bursts into the room after having a nightmare and she wants to go to bed with him in his bed. She doesn't want to be alone and she's stubborn so he lets her if she goes to bed on the other side of the bed. So she does, but he doesn't stop watching porn or stroking his cock. Mona notices and decides to get closer and take his phone. She realizes there's porn on his phone and he's watching it with her in the same bed as him! She gets really curious and horny so she asks if she can watch with him. He says yes finally and the watch porn together. Sister is getting really horny so she takes off all her clothes and starts stroking her brothers cock. He takes the covers off and asks what she's doing but doesn't stop her. She lowers herself and starts sucking his cock. His cock starts throbbing and he wants more of his step-sister. He pushes her  onto her stomach and fucks her from behind before fucking her missionary. She then eagerly gets on top and fucks his hard cock until its ready to burst. He tells her he's about to cum but she keeps riding him until her cums inside his tight sisters pussy. She's happy at first but then starts feeling weird and remembering that she's not on birth control. She leaves and brother goes to bed.