UPPER MARLBORO, MD. — Maybe a White House Special Assistant to President Barack Obama is used to packing big guns when visiting members of the House of Representatives in her job as special liaison to the House. Maybe she has a new sex-game involving the use of firearms in a version of Russian roulette. Or, perhaps she is just an alleged hot-headed dirtbag who is simply another story in the Naked City of PG County where shootings and murders are part of the political and social landscape. Charging documents say that after sex with the cop she wanted his cellphone passwords to track down the lying cheat’s other girlfriend.