Need brother out house for fwb

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My fwb is supposed to be coming over tomorrow morning/afternoon but my brother is home. He’s my twin (17yo) - how do I get him to leave? He doesn’t know I’m fucking anyone so I’d rather not tell him anything. Usually he stays in bed and sleeps late and he can’t drive anywhere and most of his friends are away. What do I do?

Update: I’m driving him to his friends for the day 😂 result!! (He’s guessed I’m having a guy over but he thinks it’s a different boy- that boys my bestie but everyone thinks we’re a thing). Thankssssss 💓💓