Jacking it for my girlfriend's step-daughter (with Lara Brookes)

Lara is your girlfriend's step-daughter. She is very sexy, but you have tried to maintain a safe, fatherly relationship with her. She heard you and her step-mom last night having very loud sex. Lara is curious about what made her step-mom go nuts, so she asks you for a peek. You let your towel drop to the floor. Lara then asks what your dick looks like when it is hard. Not being one to be difficult, you agree to get it hard for her if she promises to keep it a secret. At least she is over 18 years old, so that eases your concerns. Lara takes off her shirt and shows you her perky tits. Then she asks what you were doing to her step-mom that made her scream so loudly. You tell her and she seems interested in your skills, suggesting that you might someday show her yourself. You continue stroking off as she slides off her panties. She wonders where you will want to cum. She asks you not to stop as you stare at her pretty pussy.