Kate Winslet is in negotiations to topline "Little Children" for New Line Cinema. Winslet would play the role of Sarah in the adaptation of Tom Perrotta's book, which Todd Field is set to direct. Field also is producing with Ron Yerxa and Albert Berger, and he co-wrote the screenplay with Perrotta, whose other credits include "Election." Toby Emmerich and Kent Alterman are overseeing the project for the studio. The film is set in a suburban town where perfect parents rear perfect children by day and surf Internet porn and have affairs by night. Winslet's character is a mother who has a fling with a stay-at-home dad. Winslet most recently starred in "Finding Neverland" and "Eternal Sunshine of the Spotless Mind," for which she received her fourth Oscar nomination. Her upcoming projects include "All the King's Men" for Columbia Pictures and "Romance & Cigarettes" for UA/Sony. She is repped by CAA.