She complied then closed her eyes as he walked her across the bathroom and into her room, placing her in the middle of her bed. He used his wand to cast a quick drying spell so that neither she nor her bed were wet, then waved a quick warming charm over her. He pulled the covers over naked body and she watched him as he went back into her bathroom and came back out with his clothes back on. "What about you?" she asked, sitting up slightly, looking at him curiously.
"What about me?" he asked.
"Well, you pleasured me, don't you want me to uh, return the favor?" she asked shyly.
He grinned and shrugged, "I'm alright. But I won't mind taking a rain check." Hermione blushed again as he continued, "You really looked exhausted tonight, so get some sleep and I'll see you in the morning, ok?"
She nodded, laying her head back on her pillow as he noxed the lights in her room and closed her bedroom door quietly.
Once in the hallway, he went to his room and to his own bathroom, stripping is clothes again and standing under a very cold shower, willing his erection to go away so he could go back to his lab to finish his work.