Yes she is!

The Invisible Woman stands in your living room clad in her Fantastic Four uniform. Your plan had worked out perfectly. "So what do you want from me exactly?" Susan asks.

"Well, Mrs Storm, I want you as the next member of my harem just like She-Hulk is but more than that I want to give you unparalleled pleasure. You'll take me in every whole enjoying every moment of it. You wont even miss your old life."

"What about my family?" she asks.

"Don't worry. For the time being you will continue living your life as you previously had. The only difference is that whenever I call you day or night you will be here, serving at my pleasure."

"Okay"

"Okay, what?"

"I'll be a member of your harem."

"Strip!" you order, and she does. Slowly unzipping the front of her suit, revealing that Susan was not wearing a bra."You had already decided you were going to be my whore before you came here, weren't you?" Not answering you she finishes striping off her suit. She strikes a pose for you showing just how fit she is for a woman who has two children. Her only flaw is the unkempt patch of blonde hair above her cunt, "You'll have to take care of before the next time I call on you, Understand?"

"Yes."

"Now, come and ride your master." Clumsily she climbs on top of you and quickly inserts your cock into her pussy. Letting out a moan of unadulterated pleasure as she slowly raises and lowers her body on yours. "I want to see inside you." Taking your meaning she lets you see past her skin into her vaginal canal. You watch as she rides you cock seeing as it works its way into her. Seeing her walls grip its length. Within seconds you flood her with semen. Unfortunately when she cums she loses control of her powers denying you the opportunity of seeing your seed working its way into her womb.