Watch Your Sister's Sister (2011) HD Full Movie Free on solarmovie.do. Watch Your Sister's Sister (2011) online free. Iris invites her friend Jack to stay at her family's island getaway after his brother's death. Jack'...Iris invites her friend Jack to stay at her family's island getaway after his brother's death. Jack's drunken encounter with Iris' sister Hannah at their remote cabin kicks off a revealing stretch of days.