Back to Childhood with a Twist

Transform your home into a typical 'Mom's Home sweet Home'. It's all about being the son returning home after a long time. The 'mom', your girlfriend, is preparing something delicious in the kitchen wearing her favorite, stunning dress. You enter from the 'outside', feeling the warmth and love of Mom's home. The evening progresses with Mom caring for you, feeding you with homemade sweet pastries, talking about your day and reminiscing.
As the night falls, the scenario takes a sharp turn. The playful and cheerful routine becomes more intimate, the mother-son dynamic evolves into touchy-feely, and coy glances shared across the table. After all, you're not the little boy anymore and that gorgeous woman is not your mom.
The atmosphere becomes heavier with the underlying tension as you two begin to give in to the passion. As the story unfolds, the characters blur into each other and the taboos fade, leaving behind adult desires and the thrill of the forbidden, culminating to a heated night full of forbidden tryst and passion.

To prepare for this scenario, create a warm, welcoming home environment with sweet homemade pastries. This would create the illusion of 'coming back home.' Make it even more real by dressing up as a young lad, complete with youthful enthusiasm and a backpack. The 'mom' should look attractive yet casual, maybe wearing a stunning dress that shows off her amazing body.
The roleplay's rhythm should initially be more innocent, focusing on care and nurture. Later in the evening, introduce subtle flirting, teasing remarks to increase the scenario's sensual tension. Remember, the more realistic the setup, the more exciting the roleplay will be.
Ensure that both of you are comfortable with the script. Maintaining open communication is significant, as both parties should be comfortable and enthusiastic about the scenario, making it a keystone of the entire role play.

Always remember, the key to a successful roleplay is good communication. Discuss your comfort levels, boundaries, safe words beforehand. This scenario is a little quirky and could touch sensitive spots, so make sure you both are comfortable, and everything is consensual.
Play your parts wholeheartedly yet remember it's all pretend. Getting deeply invested in the characters can bring about an authenticity that's quite enticing and thrilling. Don't forget to enjoy the overall experience and cherish these intimate moments spent together.
Lastly, though the theme might suggest taboo, ensure no real-life family member or circumstance is referenced to keep things respectful and enjoyable.