Lizzie knows you like watching girls while you jerk off. She asks to see what you have and when you show her your old dick, she asks if it even still works. Do you think that you can jerk that old thing for her? You are old enough to be her grandfather, but she still wants to see if you can jerk that ancient dick. Will cum actually come out of it or will it just be dust? You don't know exactly why she is playing with you today, but the reason does not matter to you. You just keep jerking your dick. Her perky, small titties make even your old cock hard. All the effort it takes for you to jerk your dick kind of impresses Lizzie and she smiles sweetly at you. Come on, grandpa, jerk off for Lizzie. When she takes off her panties to show you her 18-year-old pussy, you almost flip out, but you keep stroking. Maybe you should have taken a Viagra to help you? No, you are doing pretty well on your own. You just hope that you can actually cum when she tells you to do it.