Sarah was still your wife, maybe somewhere deep down the woman you loved was still there, and she was trying to come through.
"Please, baby, come back," Sarah's voice is heard from inside. "I'm not going to do anything to you."
After a brief moment of hesitation, you open the door and go inside, closing the door behind you. "Sarah, where are you?"
"I'm right here, Baby," Sarah says, walking into view, she's still naked and looking at you with lust in her eyes. Before you can even react, she grabs you and pushes you onto the bed.
"Sarah, what are you doing?" You protest as she straddles your chest, tearing off your clothes. "I thought..."
"You thought I wasn't going to, like fuck you?" Sarah giggles, you try to sit up but she pushes you down again.
"You're better than this, Sarah," you try to say, but she doesn't respond with words, instead she thrusts herself down on your erection, which had grown despite your protests. She starts bouncing up and down on your cock, as you try to protest again she thrusts one of her breasts into your face, she moans louder, moving her hips faster.
"Come on Brad, fuck me!" Sarah says, and despite your best efforts, your resistance is breaking down as you start to thrust into your bimbofied girlfriend. You're starting to feel different, your mind becoming more fuzzy with each thrust.
"Please... stop..." You say, but your voice is changing, becoming more female as you finally cum into her pussy. Sarah moves down, licking quickly at your cock, you look down at her, shocked to see as its beginning to shrink. At the same time, your nipples are growing while other parts of your body are changing. Your mind becomes more fogged, you can't even bring yourself to protest anymore as your moans become more feminine. You cum one more time into Sarah's mouth as your cock completely shrinks, forming a little nub and your organs re-forming to make a pussy and ovaries, your body rocks with your first female orgasm as the change finishes.
You blink a little, it was weird, you could recognize Sarah, but you weren't sure of your relationship with her. You grab her and flip her over, kissing Sarah on the lips, it was time to return the favor to her. Now, if only there was a man to join.