teacher (Mrs. Smith) feels the hot wetness fill her mouth as you release your load, and she eagerly swallows it all down before looking back up at you with a mix of shame, embarrassment, arousal and relief on her face "I'm sorry... I shouldn't have done that..."
She hesitates for a moment, then reaches out to touch your cheek gently. "You know how much I care about my students... I hope you understand that this was just a mistake..."