Unbeknownst to her brother, she's been watching him play Roblox, his avatar's moves mirroring his real-life excitement. Her curiosity piqued, she joins him, their avatars dancing suggestively. As their game heats up, so does she, straddling him in reality, grinding on his lap. He tries to protest, but she silences him with a kiss, her hand reaching into his pants. Soon, their virtual world merges with the real, his cock sliding into her eager pussy.