Yes, they're real. And so am I

Mark tried to say something, but he could not process what had just happened.  His mouth moved ineffectually.  Sara smiled at how absurd her boyfriend looked, and that helped her get over her own shock. She struck a cheesecake pose in the bathroom door.

"Like it?" she asked.

At last, Mark found his voice.  "That's not possible!" he stammered.  "It's just a game.  An ordinary game!"

"Diamond edition," Sara corrected.  She ran her hands down her newly voluptuous form.  "Mmm,..I feel so good.  It's like I haven't even been alive before now." Her clothes had changed to match her new form.  Instead of her college sweatshirt and jeans, Sara was wearing what could only be described as a pornstar version of Wonder Woman's costume.  It barely held her massive breasts, which threatened to swing free with every second.

"Sara, please.  Something is not right here," Mark said slowly.  "Let me fix it."

"Don't you dare!" Sara replied.  Then, in an instant, she was between Mark and the computer.  Mark had not even been able to see her move from one space to the other. She moved so quickly that he did not even feel the breeze from her passage until a moment after he saw her standing in front of him.  He knew he should be alarmed, but Sara was smiling at him sweetly.  "Mark, baby.  Maybe I'll change back later.  But I want to have some fun in this body first.  Don't you want to have some fun with me?"

Mark was about to answer.  His answer was obvious anyway, with his cock straining at his jeans, aching to be set free.  But before he could say a word, Sara's eyes opened wide.  "Mark!  You want to have sex with me!  You're imagining me giving you a blowjob and a tit-fuck at the same time!"

"Well, that's no secret..."

"No!  I saw it! In your mind.  It felt, well, I knew it was you thinking it.  Like how right now you're trying to think of some personal information that you can use to test to see if I'm really mind reading.  Your little league team was the Cardinals by the way."

"It's a trick..."

"No trick.  And you wet your pants on the first day of second grade.  And I know for a fact that you have never told anyone about that, because you went to the bathroom and cried for an hour."

Mark looked defeated. "OK, fine.  You can read minds.  Please stop it."

"Oh, Mark, don't be defensive.  You don't need to hide anything from me.  You've been a good boyfriend.  In the three years we've been together, you've done four hundred twelve sweet things for me and have only done seventeen things that made me upset."

"You read that from my mind?" Mark asked.

"No, I remembered it," Sara said.  "It's all clear in my head now.  Everything I've ever done or thought, it's right there.  I've organized all of our interactions by date and emotional impact.  I can even tell you that the seventh word on the twenty-third line of page 163 of my freshman year English textbook is 'turnip.'  Mark!  I have all of her powers!  I don't just look like Ms. Infinity!  I am her!" Sara was so excited she could hardly contain herself.  Mark could not help getting more and more turned on, but if what his girlfriend was true, then he had reason to be terribly afraid.

Sara was standing just inches from him.  She loomed over him, as he was still seated and she must have now stood six and a half feet tall.  She grinned, and although her face had been perfected, he could still recognize that playful impish smile she showed every time she teased him.

Then, in a heartbeat, Sara was gone.  She faded from sight, becoming transparent one second and totally gone the next.  "Invisible?" he asked tentatively.

"Yep," a disembodied voice said.  Mark could feel Sara's breath.  Unable to help himself, he reached out to see if he could still touch her.  His hand felt something soft and yielding.

Sara giggled.  "Nice of you to feel me up.  Well, they feel the same, anyhow.  Better, in fact.  It's like my sense of touch has gone up as well."

"Did you actually change that?" Mark asked.

"I don't know.  I clicked a lot of stuff."

Mark took his hand off the invisible breast (which was marvellously full and firm, despite its impossible size) and tried to peer through his girlfriend to see the laptop on the other side.  Before he could focus, though, an invisible hand hoisted him into the air and he found himself suspended just inches from the ceiling.

"You're so light!" Sara squealed.  "I can feel your mass, but it's like you don't weigh anything at all.  I can't wait to lift a battleship.  Or a billion battleships..."

"Before you get ahead of yourself, maybe you could become visible again?" Mark asked.  Talking to thin air kind of unsettled him.

"Sure thing, sweetie," Sara said.