18yo Stepdaughter's Panties

You are jerking off to your tiny tits stepdaughter's panties as she walks in. Well now what. She wants to know what it turns you on so much. She decides to give you a little more to jerk off to and plays with her wet pussy in front of you. Next she wants to know how hard your cock is and tests it out with her lips. How far will this go? Only one way to find out.