Not much choice anyway

"Fuck...... what the....... what the Hell did you just do to me?" Andy said still trying to wrap his head around those strange sensations he had just felt.

"Hmm, do you want to feel that again?" She asked with a smile as she began to look even more human.

"What's happening to you?"

"Can you think of a better way to feed off a species?" She said as the giant tentacles that she had below her waist suddenly began to pull together, transforming into two long, smooth, and sexy-looking legs.

She stepped through the portal, stepping down on his mattress looking down at him. Her body was still green, and her hair still looked like tendrils, but her fingers had shrunk and she had grown fingernails as she examined them. The tendril from her stomach was still attached to his penis as he looked up at her.

"I do like this form. Thank you for giving it to me."

"I didn't........ how?"

"When I read your mind earlier, I found what you were sexually attracted to, which inspired my new form," she said before she sat down on his legs. "Do you like it?"

"I.... well........ I....." he said, looking down at his penis, which was still being filled with green fluids and glowing.

"Don't worry, we will still have lots of fun. Oh by the way, the words you were looking for were Prope Ostium," she said before the portal suddenly closed. "But it really doesn't matter now, does it?"

"Please, don't hurt me!"

"Hurt you?" She said, confused by his statement. "You have freed me, and given me a new form. The last thing I would do is hurt you. Besides, once I'm done transforming your little sex organ here, I'm gonna have a lot of fun showing you how to use it."