Love line

A small boy in a small village aged 4years reached a small town where his grandfather was an Indian government railway employee. Motto was proper upbringing, far from farmlands and on the otherside of road I use to live to watch him.
Boy use to leave with his family where his father and mother were not present , rest all where part of this house and on opposite side of road there was another house where his grandfather co worker use to live and that co worker had a daughter of again same age of six.
This boy use to go there and meet the girl named Sonia Pandey.
Time started passing by and both became good friends not knowing that two people were closely watching there every move, One was me but who was other. None other than sister of boy who was of 8 years and before boy came here Sonia and sister were close friends but now mirror of friendship was breaking up , can you guess why.......................
But these two kids were unaware of the changes taking place in sister who wanted to act as villan in this crush model theory and was planning to crush it.
Little boy and his little friend named sonia started holding hands and sitting on ................................to be continued