Your biology teacher was afraid you weren't going to pass her class. She was willing to help you by giving you extra credit. If you couldn't grasp the concept of plant reproduction, then perhaps you could understand human reproduction. This was taught best with hands-on learning. "We're going to act it out," she explained, "I need to know you fully grasp it." She'd instruct you to stroke your cock as she stripped down, groped her big tits, & swayed her hips from side-to-side. "What do you think of my tits?" she asked. "Can you imagine what they'd look like full and swollen with milk?" She'd masturbate with you, then stroke & suck your cock to make sure your balls were full with semen. "Now it's time to merge the sperm and egg together," she licked her fingers. "My tight pussy is going to milk those balls." She got on top of you and rode you until you came inside her pussy. She'd make sure to apply this extra credit to your grade. And, once she ended up pregnant for sure, she'd be sure to raise it even higher. **Includes: POV, biology teacher doesn't want you failing her class so she offers extra credit - you're going to learn about human reproduction, masturbation encouragement, striptease, dirty talk, tit groping, masturbation, virtual handjob & blowjob, virtual sex, riding, cowgirl, creampie, impregnation, breeding, insemination, brunette, MILF, older woman, cougar**