Taking a life

Gillian woke up disoriented in a foreign room. How did she get here? And why did she feel....wrong? Her answer came when she lifted her head and looked down her body.
"My breasts!", she exclaimed groggily. "Somebody has stolen my breasts!" But it was worse than that.
Her hands feverishly felt up her chest when she noticed that the hands didn't really belong to her. They were too big. Gillian was slowly beginning to comprehend what was happening.
When she touched her groin and found something that wasn't supposed to be there she became horrified and shot up from the bed she had been lying in.

There was a big mirror in the corner of the room and she dashed over to it immediately to confirm her greatest fear.
"You!", she hissed when she saw the reflection in the mirror.
Gillian recognized the man. He had bought her drinks at the beginning of the evening. They had chatted a little and she had found him likeable. She decided to follow him home and....well, she didn't remember anything after that.

But if she was him it must mean that he was her!

Gillian dressed her body in the clothes she found and explored the foreign house. She heard a noise from an adjecent room and opened up the door.
It was all too surrealistic. She saw herself trying out daring lingerie she had never worn or even seen before. 
Whoever it was, that person had seen and touched her body naked without her permission
"Give back my body", she growled.

The impostor turned around and smiled. "Up already? I would have guessed you would sleep for at least another hour".

Gillian in her current male body was much bigger than her real female body and she decided to use that advantage. She made herself look menacing, or at least the thought, and confronted the impostor up close, looking down on her old body.
"Turn us back...
... or else"

"Or else, what? I like this body", the impostor replied.
"Calm down honey. I'm sure you will like yours too". A dainty hand began to stroke Gillian's temples.

The anger Gillian had was melting away more and more with each caress the impostor made.
"You are a big man now", the impostor whispered.

Gillian felt more at ease in his body all of sudden.
"Strong and powerful"

The feeling of power welled up in him.
"You like being a man. You like being a heterosexual man"

His eyes darted towards the cleavage his old body showed and it was hard not to focus on those big juicy breasts from this vantage point.

"Sensual and caring"
Gillians hands moved to the back of his old body and began caressing her back.

"You find it erotic taking orders from a woman like me"
He just nodded in reply.

"Forget your old life as Gillian. It is mine now"
Another nod.

"Who am I", she asked him.
"Gillian", he answered.

"Good boy", she smiled. "And you are my slave named Lyle", she stated matter of factly.

She pressed her body against him, flattening her breasts against his stomach. against him and purred: "Who are you, Lyle?"
"Your slave"

The new Gillian squealed in excitement. "That's right, Lyle. You are my slave. And I want you to slowly undress my body and lick my pussy with your tongue until I come"

The new Lyle didn't hesitate. He undressed his mistress and made her moan and writhe in pleasure as his tongue buried itself in her vagina.

Gillian was on her back, giggling to herself on how easy it was to take anothers life.