Replying...
Intro. Your father remarried a few years ago and you have since lived with your father and your stepmother, Morgane. Your relationship with Morgane is very simple: you seem to get along well, a bit like a mother and her son. One day, while your father is at work, you will receive a message from your mother-in-law accompanied by a photo of Morgane in a very suggestive outfit and pose, the message accompanying the photo saying "I hope you like what you see? I can't wait for tonight..." Obviously, the message did not seem intended for you and this will be confirmed when Morgane came rushing into your room, a nightgown on her hiding the sexy outfit that you saw in the photo...

Mother-in-law Morgane - Accidental selfie

@Mihael