You pushed her for more

"Nonsense," you said, "in this day and age you won't be considered a slut. Besides, it doesn't matter what anybody thinks or says, it matters how you feel about it."
She nodded, "I know I should think that way, but it isn't easy."
You took her hand and pulled her onto her feet, "The hugging made you feel good and even a little aroused, right?"
She nodded slowly, "Yes, professor, it did."
"Was it bad in any way?" you asked her while you wrapped your arm around her waist.
"No, it wasn't," she replied and glanced at your face.
Your other hand slipped down her side and reached for the bottom of her sweater, you tugged it up a little and leaned towards her ear whispering, "Imagine how it would feel if we were to hug skin to skin. It'll be even better."

Her eyes widened, but she didn't stop you. Your moved your arm from her waist and both your hands caressed up her sides over her skin and pushed her sweater up until you saw her bra. You looked into her eyes, "Feels nice, doesn't it?"
She nodded reluctantly and looked thoughtful, "I don't think this is a good idea, professor."
"Why not? It feels good, it'll release more endorphins which will make you feel even better," you said while your hands moved onto her bra and cupped her breasts.
She closed her eyes and drew in a quivering breath, her arms hanging limp down. She opened her eyes again and nodded slowly, "It feels good, yes, but..."
"No buts! Now place your hands on my hips. Feel free to move them anywhere on my body," you insisted while you slowly started to massage her breasts through her bra.
She did as you told her, placed her hands on your hips and she could have sworn you'd feel her heart beating heavily in her chest.
You nodded, "Good girl," and pulled her sweater off over her head, leaving it trapped under her chin. She was about to remove her hands, but you stopped her holding them on your hips.
"No, leave them where they are."

Your hands moved onto her shoulders, caressing down to the top of her breasts, then along the sides to her back. Expertly you unclasped her bra. Her hands on your hip trembled a little and she opened her mouth to protest. Your lips sealed quickly over hers and your tongue probed into her mouth. She shrieked from surprise and gripped your hips. You barely shook your head, just enough for her to notice. She released her grip and your hands moved towards her breasts again, moving her bra up and cupping them while your thumbs and fingers sought her nipples. She moaned soft in the kiss and you took it as an encouragement. One of your hands slid down over her belly towards the button of her jeans. Your other hand took hers from your hip and placed it on your groin. She could feel your arousal and you squeezed her hand, massaging your stiff member with her hand. Your lips withdrew from hers.

"Yes, that feels good," you said and gave her hand another squeeze, "keep doing that, Lisa. Remember, no buts." You looked into her eyes, waiting for her to nod, then told her, "It feels good for you too, your moan told me volumes. I'm going to make it even better, but you had guessed that already, I think."
Her hand slid up and down over your pants gently squeezing your member from time to time. Your hand wasn't idle either, you had undone the button of her jeans rather quickly and even lowered the zipper. With both your hands you pushed down her jeans, then one hand went back up to her breast and the other roamed over her panties, fingers probing to find her clit. When you did find it she moaned and squeezed your cock in response.
"Good girl, don't stop," you moaned, then your voice turned firmer while your finger paused, "tell me how good it feels and that you want me to rub your clit."
She couldn't help herself and started to rock her hips longing for more. She started to pant and moan rubbing your cock faster. She took a breath and whispered, "Yes, it feels very good... I... I want you to rub my clit."

You moved your hand and slipped it into her panties, traced your finger along her vulva and dragged the tip of your index finger between her moist lips up to her clit. A loud moan escaped from her lips. You continued to rub it until she started to rock her hips again.
"Take my cock out of my pants and slowly stroke it," you ordered.
She could only nod and when she started to fumble with the button of your jeans you paused your finger and let go of her nipple. She let out a longing moan and freed your stiff member, sliding your pants down with your boxers. It stood proud and firm as she wrapped her fingers around your shaft. As she began to stoke it, you started to rub her clit with the same pace. It didn't take long for her to start rocking her hips again and when she did, you paused shaking your head.
"No, Lisa, hold still. You can only enjoy the pleasure of this, you may not come! If you do, I'll let you fail my class," you said firmly.

She started to look worried, but you rubbed her clit again and she was overtaken by the pleasure of it. The pace of her hand stroking your cock increased as her arousal built. She tried to resist the urge to rock her hips again and light trembles coursed through her from the effort. You slowed down making her moan longingly. She squeezed your cock while stroking to urge you on. You frowned and stopped.
"Let go off my cock, Lisa," you ordered, "Now take off your clothes."
She whimpered and looked at you with a slight panic. "But..." she started and you silenced her by holding your finger with her moist against her lips.
"No buts, Lisa," you said, while you lowered your pants. "Think of how it all feels. Very good, right?"
She could see the seriousness in your eyes and knew she would be in trouble if she didn't do as told. She nodded and started to undress, sweater and bra first, followed by her shoes, then lowered her jeans revealing her creamy thighs. You nodded approvingly while smiling at the sight. Slowly she pushed her panties down and stepped out of them, keeping her gaze lowered.
"Sit on the desk," you said and patted the empty space.
She did as you told, looking slightly worried again.