Harlequin Presents Readers discussion

The sister of the female protagonist is pregnant but the father doesn't want to know about the child ( I do not remember if he was married) . The sister dies and the protagonist takes care of her grandson. suddenly appears a man saying he is the baby’s uncle, who checking the personal effects of his brother who died also found a letter that had sent the sister dead informing him of the pregnancy. The protagonist tells her that his mother is very sad, and that seeing her grandson will be fine, she at first does not want but then decides to travel with him and live for a period in their house The mother suspects of her and does not treat her well, But when the mother she realizes that there is an attraction between them and they start a love story, I do not remember why he decides to make a DNA to his grandson and gives negative, have a discussion. he goes to work, at that time she packs her bags and comes home, He goes to look for her and tells her that he does not care that it is not his nephew who loves her and wants to marry,. happy ending,