Her daughter would constantly come home with a big smile on her face, constantly gushing about her white boyfriend. How well he treated her, all the intimate kisses and sweet things he did for her. And when they were alone she would tell her about his size and how good in bed he was.
They were close always talking and helping eachother. But her mom was a woman too with her own desires she could barely contain her curiosity for her white lover... So when she finally got to meet her daughters prince charming this was the natural result...