I need help to find my favorite story: white teacher and a geeky black student

[EZmatic]

Hello, I'm looking for my favorite story and I can remember everything about it but the title, the story is about a white teacher and a black geeky student with a huge black cock. And the student has a rough home life and the teacher realizes it and takes him home with her. When she discovers that he has such a huge dick, she fucks him and tell him to only refer it as her cock. I've been looking for months for that story, but I can't seem to find it, I don't remember if it was in the first time category or the interracial, so if any one can help me find it I'd greatly appreciate it.