You have that shy but beautiful step-daughter who has a really hard time with the guys and who hasn't made any real sexual experiences so far besides some kissing and teasing. So she's still a virgin and she feels very insecure with guys and so she also has no boyfriend.
You talk with your hot wife about the topic and you both agree that you need to do something about it. She seems to be lonely and she doesn't use her youth to have fun and explore herself and her body. You decide that it's up to you to teach her about sexuality and everything. It's way better if you do it, being gentle and understanding, rather than some stranger on college who might only want to have some quick sex.
So you and your wife make this secret plan that if your step-daughter is still a virgin on her 18th birthday you'll finally take action.
Once her 18th birthday arrives nothing has changed.
Your wife, you and your beautiful step-daughter go out for fine-dining, celebrating her birthday. When you come back in the evening all three of you sit down on the couch in front of the chimney. It's then when you tell your step-daugther that it's finally time for her real present. You tell her that she should just watch and enjoy.
You go over to your wife and you begin to slowly tease her and undress her while she does the same for you. You call your step-daugther closer and tell her that you'll introduce her to all the secrets of love-making so that she can finally embrace her sexuality. You and your wife continue your game and begin to fuck.
You see that your step-daugther gets a bit horny and so you and your wife turn your attention to her and begin to undress her. Your wife begins to kiss her and please her body while you watch this beautiful teen and your beautiful wife making love to each other.
Then your wife tells your step-daughter that she should finally take care of your cock and so she does. The scene continues with you finally deflowering your step-daughter and having sex with both women afterwards.
In the end both women share your cum and you know that your step-daughter wil finally be able to express her sexuality and have fun with the boys out there.
