You made no secret of the fact you are in love with your step-mother. You have always been open about the fact you want to have sex with your step-mom, and now you've pushed her far enough. After months of asking and trying to impress her, your step-mother finally allows you to get your infatuation with her out of your system. She is going to let you put JUST the tip inside of her, and then you must promise to leave her alone. There are two rules... rule one is you must not cum inside of her, and rule two is you must NOT push your cock any deeper inside of her than JUST the tip... I wonder which of these rules you will break? ;)