By trading places.

Stormtrooper Morty moaned in pleasure, as the real Morty slipped quietly into the room. While his sister was distracted with the cock in her mouth, he waved at himself and put a finger to his own lips. Other Morty waived back, but thankfully Summer was to busy to notice. Pointing to his sister, and then covering his eyes, he gestured to his dream clone to follow his instructions.

“Hey sis,” Stormtrooper Morty moaned “close your eyes for me babe.”

“Why?” Summer asked confused.

“Just close them!” He frowned, annoyed.

“Yes, sir.” The busty blond purred, doing as she was told.

Morty slipped over to his alternate self and shooed him off the bed, taking his place. Closing his eyes he took a second to calm himself, and imagined the changes in the dream he wanted. Opening his eyes, he found himself dressed as a knight, in full plate armor. Pulling the crotch guard off, he gently guided his sister back onto his dick.

Morty nearly lost it when she began deepthroating him like a pro. He still couldn't believe how talented the girl was, she must have practiced all the time. Though it seemed like if she had been going down on Ethan, she wouldn't be so nervous about which outfit to pick.

Taking a page from her dreams, Morty grabbed her head and began skull fucking her at a maddening pace. Summer gagged in surprise, but quickly submitted to his desires. Her throat felt so good, he was struggling not to loose it to fast. As the pressure built he finally had to let go or risk blowing his top too soon.

“Damn Morty.” Summer gasped far from upset. Noticing the change in attire the busty blond frowned in confusion. “What's with the King Arthur?” She asked.

“I told you I liked Morgan better.” He teased, pointing at her outfit.

Glancing down she noticed she was now wearing the Le Fay costume. “It is pretty hot.” She purred.

“Yeah, but you were right, it is missing something he moaned.”

“What's that big boy?” She asked wrapping hand around his dick, and working him gently.

“A mask, to give it a little mystery.” Morty suggested.

“Oh, I like the way you think.” She said taking him in her mouth again.

Her lips slipped across his shaft at break neck speed, as she slammed her nose into his pelvis over and over again. The beautiful little witch was so aroused by the situation that she was gagging herself on his thick meat, sending him into a stage of bliss he had never experienced before. Morty shuddered, unable to stop himself, as he boiled over, his hot seed filling her hungry tummy. Still not stopping, she milked him for all she was worth, causing him to black out.