Marta Parejo is a famous “Dr. Ruth”, author of many bestsellers on love and host to her own TV show “ Under the Sheets” about sexual advice. She has the perfect husband: Daniel Luna, a prestigious family lawyer who resolves the most important conyugal conflicts of the high society of his city. She has the perfect household: a marvelous french-style villa that her husband won in an important family trial. Everything smells like happiness until Marta, influenced by her friend and editor, Roberto Villa, publishes a book entitled “10 Years of Honeymoon”. In the book she talks for the first time about her private life and reveals all her formulas for leading a happy marriage. Leaving no detail out, Marta writes about the sexual defects that her marriage had in the beginning and says that her husband used to be a tadpole in bed. The book is a sales hit and becomes a topic of public opinion. It also drops like a bomb on the Luna household. Hurt by all this, Daniel Luna becomes dangerously involved with Verónica Dávila, an assistant at the University where he teaches. She confuses a night out dancing with a repressed love and begins to follow him in a way that could be denominated “sexual harrasment”. Daniel does not fall for her tricks but his wife is convinced that he has cheated on her. She, a “Dr. Ruth”, expert in love matters that sells solutions for happiness, loses all her composure, her comprehension and the comunication values she sells in her books. Angrily, she abandons her husband, forcing him, as punishment, to look after the kids. Offended, Daniel accepts the challenge and hires Fabiana, a sexy and extroverted babysitter whose from a lower social class but owner of an incredible sensuality and grace. Secretly, Fabiana has been in love with Daniel for one whole year, ever since she met him as one of her best friend´s law professors. To fulfill her dreams, Fabiana becomes a cheerleader for a soccer team, hands out flyers on roller blades at street lights and studies tourism engineering at night so that she might some day conquer the world. This environment that Fabiana brings into the Luna home seduces Daniel, whom is still fascinated when in her terrible english she explains that she accepted being a “baby-sister” because that is how they work in Europe and it is not the same as being a maid because it´s like being the kid´s sister.