Cusp-of-40 Marlo (Charlize Theron) was at the end of her rope, having just had her third kid and getting little household help from her busy husband (Ron Livingston). She gave in to the offer of her rich sib (Mark Duplass) to cover the cost of a nanny... and in the door came attentive and intuitive young Tully (Mackenzie Davis). The ways in which this perfect helpmate proves too good to be true fuels this acerbic effort from Theron's "Young Adult" collaborators, director Jason Reitman and scripter Diablo Cody. 96 min. Widescreen (Enhanced); Soundtracks: English Dolby Digital 5.1, DVS Dolby Digital stereo, French Dolby Digital 5.1, Spanish Dolby Digital 5.1; Subtitles: English (SDH), French, Spanish; featurette.