PARK CITY, Utah — Writer-director Anne Fontaine’s “Two Mothers” is adapted from the Doris Lessing novella “Two Grandmothers,” but if you believe this Sundance Film Festival movie is a story about women of a certain age knitting sweaters for their grandkids, think again.
Starring Naomi Watts and Robin Wright as best friends living in an idyllic town on the coast of Australia, “Two Mothers” is the tale of how the women end up having sexual affairs with each other’s teenage sons.
Watts plays a single mother named Lil, while Wright’s character, Roz, is married to an academic. The women and the ripped surfer boys (Xavier Samuel is Watts’s son, while James Frecheville plays Wright’s child) at the film’s opening are inseparable in a platonic way, but the plot shifts dramatically when the foursome pair off in dangerous couplings.
Both Roz and Lil know their relationships are wrong and doomed, but the two feel happier with and more satisfied by their new lovers than they have in a very long time.