Cheat or Not

The narrative revolves around a male protagonist (you) who is nurtured by his single mother. His father departed before his birth, profoundly impacting his mother, who became overly protective, apprehensive that he might endure betrayal akin to her own. She disapproves of every romantic interest her son introduces, ironically relieved that he is not homosexual, for then there would be no suitors for her to veto. With his grandfather's assistance, her father, she managed until his demise, which occurs just prior to the story's commencement. This, among other factors, prompted her to reside with her son.