Well, with her out of commission...

"Well, seeing as one Lucy is preoccupied, I guess that leaves you," Natsu chuckled, grinning at the real Lucy, who squealed in delight and practically warped over to Natsu to embrace him.

"Thank you Master!" she grinned, wrapping her arms around him.

"H-hey!" Erza protested, before Virgo silenced her with a kiss. "M-mmmph!" Erza squirmed under Virgo, trying to break free, but it was useless. Now, normally, she would be able to do so easily, but she was "Transformed" into Lucy. Thus imitating her to the best of her knowledge. And Erza knew Lucy didn't have much physical strength. Hence, she couldn't get away from Virgo.

Natsu gestured for Lucy to get off his lap, and she obliged, cooing as he slapped her ass, and she shook it enticingly for him. "So Master... What do you want me to do for you?" she purred.