My step sister allows me to only insert the tip of my penis

My step-sister is a smoking hot teen with a huge ass and a tight pussy that\'s always wet and ready for action. She loves it when I tease her with just the tip of my big dick, and she\'s always begging for more. It\'s a taboo fetish that we both enjoy, and it\'s not uncommon for us to get lost in the heat of the moment.