My Mother, the Spy -Part 2 of the series

Part 2 follows on from part 1, with a little backtracking when Susan goes into detail about how she and her mother arrived at their destination, a small Greek island.
Then the story picks up again eight year after they have settled within a community of olive farmers. Susan has since married Jorge and they have two children, Kiki and Nitsa, now five and seven years old. Paula/Roulla has since recovered from her previous ordeal and she is now teaching the children on the island Tai chi and Karate.
Nothing untoward has happened since their arrival on the island, but then one day Susan/Sofia senses danger is approaching. For when she was shopping in the village a man suddenly ducked behind a pillar to avoid being seen. At first she doesn't tell Jorge, but later when other incidents begin to happen around them, she is forced to tell both her mother and Jorge. Jorge tries to persuade her that there is no reason why anyone would come after her and her mother agrees. But as time goes on they are forced to protect themselves from danger by becoming more observant and not attracting attention.
Then someone arrives on the island that both mother and daughter recognises. But is this person a friend or a foe?
Part 3 will carry on from here and Part 4 will conclude the series.