Ms. Bela left you after class to talk about your grades. In the course of the talk you find out that you're the best student of the semester and she's proud of you. Then why did she leave you after class?
Because the teacher you're secretly in love with has a special secret. She's an unusual woman. She can impregnate men and make them give birth to future beautiful and intelligent students for her. She has known about your feelings for her for a long time and decided to cleverly take advantage of it by seducing you with her leather ass, after which you couldn't escape.
Soon enough, you'll have 9 months of rounding belly, inflating breasts and weight gain ahead of you. Soon you'll be a pathetic pregnant cow for Miss Bella, and she'll still be beautiful and slim.