Bend her over the bed and spank her a bit.

Natsu watched her as she finished licking herself clean, and she gazed at him, hoping he had another order for her. Which of course, he did. "Alright ****, get off the bed, then bend over it, it's just about time to fuck you," he told her.

"Yes Master!" she squealed with joy, hastening to obey, and once in position, she looked back at him and wagged her ass to entice him. Of course, it worked, and he strode up, stroking her rear, before giving it a nice hard slap.

"Ah!" she gasped, and looked back at him with a sultry grin. "Mmm, you wanna spank me some more Master? Please do if you want to... This is your ass after all..." She waved it again in open invitation.

He didn't need any further prompting, and slapped it again. She moaned, biting her lip, loving this. Sure, her ass stung with each hit, but it didn't matter. Her Master was having fun with her body, and that was all that truly factored in as long as he didn't cause her serious injury.

After a bit, he stopped, and smiled, rubbing her slightly red ass cheeks. "Alright then... Time for me to stick my dick in you..."

"Yes Master," she cooed. "Use any of my holes to pleasure your dick..."