Perhaps it’s because I have two sisters and two daughters and my wife comes from a family of five girls that I was able to overlook the romantic-comedy contrivances of Because I Said So and instead appreciate the few moments of female, familial authenticity. Diane Keaton plays a meddling mother who tries to engineer the romantic life of her youngest daughter (Mandy Moore) by surreptitiously auditioning suitors via the Internet. Keaton manages to redeem a thoroughly unlikable character, while Lauren Graham and Piper Perabo, as the two other sisters, offer smart support. This isn’t Pedro Almodovar, but it’s knowing enough.