Boston Latino TV film critic Tim Estiloz reviews "The Back-Up Plan" starring Jennifer Lopez. After years of dating, Zoe, played by Lopez, has decided waiting for the right man in her life is taking too long. Determined to become a mother, she commits to a plan, makes an appointment for artificial insemination and decides to do it alone. That same day, Zoe meets Stan - a man with real possibilities. Trying to nurture a budding relationship and hiding the early signs of pregnancy becomes a comedy of errors for Zoe and creates confusing signals for Stan.