latasha gosling , 27 , of tisdale , saskatchewan , was found murdered in her home early wednesday in tisdale , saskatchewan in canada .
her two daughters , janyaa , 4 , and jenika , 8 , and her son landen , 7 , were also discovered dead .
hours later police found steve o'shaughnessy dead at his residence , along with his and gosling 's six-month-old baby , who was unharmed .
gosling 's family said o'shaughnessy was controlling and was afraid gosling would leave him for her husband , who she was separated from .
o'shaughnessy sent the photos a day before her husband 's birthday .
gosling 's friend said she had broken up with o'shaughnessy recently .