The Spy Next Door (2010) on Netflix

Bob Ho, a Chinese spy working with the CIA to stop a man named Poldark, has been posing as an importer while dating his neighbor, Gillian, a single mother with 3 children. When Bob captures Poldark, he retires from the spy game. He wants to make a commitment to Gillian, but her children are not exactly warming up to him. When Gillian has to go out of town, Bob offers to take care of the kids while she's away, which proves to be no easy task. Poldark somehow escapes, and it's apparent that some in the Agency helped him. At the same time, Colton (one of Bob's CIA associates) asks him to look at something Poldark had on him that appears to be encrypted, hoping he can crack it. When the children rummage through Bob's home to see what they can find out about him, they discover the file and download it. When they try to open it, Poldark tracks it down and sends his people to take care of Bob. Bob manages to deal with them and then takes the children and goes on the run.