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Though Emily VanCamp and Dave Annable play half siblings on Brothers & Sisters, their romantic chemistry shines through the television screen. It's always been quite apparent that the two have had some sexual tension, which has led to an ick factor since they do play, well, brother and sister. Luckily they aren't sibs in real life, allowing them to date off screen. Let's just hope they never slip up and accidently call the other one "bro" or "sis" in real life.