Erza mirrors her perfectly

At first, Erza seemed a bit confused. But after seeing Lucy drop to her knees before Natsu, her head bowed, Erza followed suit.

She continued letting him fuck her tits, but now with her head down, her eyes not making contact with his.

"Lucy, are you alright?" he asked.

"Of course, Master" they both said at once, before looking to one another with a glare.

"Excuse you?" Lucy hissed.

"No, excuse YOU. I'm busy pleasing Master. I don't know who you think you are, over here pretending to be me, but--"

"Lucy, that's enough". Natsu boomed. Both of them shuddered, bowing their heads once again.

"I'm sorry Master!" they yelped

He sat back briefly, before a string of cum shot from him, caking Erza's breasts. However she continued on, still jerking him off.

"Er... whatcha doing?" he asked.

"I was not commanded to stop, Master. Did you wish me to?"

Natsu let out a boisterous laugh

"Yeah. You can stop."

The two girls now knelt side by side, both believing they were Lucy.