Dear Tamil Selvan and Fatima,
What will I not do to satisfy your curiosity especially if you ask nicely with a please and then follow it up with a hearty Thank You!
Basically after Leslie gets married to Gema, he hardly gets any time to develop a relationship with his wife as he has to go back to Kuwait to resume work in the Arab household where he works.
In the meanwhile Gema, who married because of her parents' desire that she gets settled given their straitened circumstances resumes her relationship with the old boyfriend and they become lovers. Leslie's mother who had rushed to get him married off because she wanted a daughter in law to look after her isn't in a position to control the situation and since Leslie sends all his savings to his wife she isn't too concerned. She uses it to build a new house where she moves in with her lover and helps him to set up a business.
After the Kuwait invasion, Leslie somehow manages to make his way back to Goa where he discovers what has happened and has to reconcile himself to the situation.
Sad story and I guess it was a common enough story at the time. The novel is fairly realistic in that sense although I think that the plot could have been handled better.
Best
Augusto