Alaska Gov. Sarah Palin called her ex-almost-son-in-law, Levi Johnston, a liar this week, after he said the conservative governor had let him share a room with her teenage daughter Bristol and “probably knew” they were having sex. “Moms are pretty smart,” said Johnston in an appearance on The Tyra Banks Show. Johnston and Bristol Palin had a child four months ago, and recently called off their engagement. Johnston said his ex-girlfriend “doesn’t want me around.” In a statement, Gov. Palin accused Johnston of seeking “fame, attention, and fortune” and “engaging in flat-out lies, gross exaggeration, and even distortion.”