Watch The Ex Next Door (2019) HD Full Movie Free on SolarMovie. Watch The Ex Next Door (2019) online free. Katie Gatewood's love for her husband Dan is put to the test when Dan's obsessed ex-girlfriend Louis...Katie Gatewood's love for her husband Dan is put to the test when Dan's obsessed ex-girlfriend Louisa moves into the house next door, intending to drive the happy couple apart by any means necessary.