It's good that a person takes their academics seriously.
Sam is being lectured by his mom about his bad grades when she asks him what he's going to do about it.
Sam wants to propose a way to get better grades.
Sam tells his mom he'll start studying and doing his homework on a regular basis.
Sam tells his mom that he'll either sleep with the teachers or pay them but it'll be fine either way.
Sam's mom is proud that Sam is choosing to try harder to get over an obstacle.
Sam's mom is appalled that Sam thinks he can bribe or use his body for sex to get his way and is concerned about him.