我穿成了男主的奶奶 (Associated Names)

I, at the age of seventy, transmigrated into the body of the male lead’s evil grandmother in a tragic novel. The system said, “You must follow the plot.” I put on my reading glasses. “What do you mean by ‘follow the plot’?” The system hesitated. “Uh… it means you have to ab*se him. Right now,…