Harriet - Hot but stupid

Harriet was hot. she was the bike of the Senior year - everyone had had a ride. she was doing Maths for reasons passing understanding but I didn't really care as she was great to look at and it kept my student numbers up - she averaged about an E.

She was athletic, blond and about 5'4". she played lots of sports, had about a B cup cleavage, a permanent tan and liked wearing low cut jogging bottoms and t-shirts that exposed her mid riff. she had the cutest little bum ever.

I thought the tactic with her would be to offer to give her a C grade if she sucked me off whenver I fancied, a B grade if she let me fuck her whenver I felt like it or an A grade if she let me take her up the ass. She was so stupid - which one would she go for? I asked her to my office to discuss her progress in my class - I had £1000 in my desk drawer to offer.