Your step-mom has been so stressed lately. Working such long hours. You decide for your birthday you're going to spoil her--with a massage. But not just any massage. From you! You're a massage therapist and you love giving women like her a great, deep, relaxing massage. Its kind of your specialty demographic, actually. Of course, it helps that you're handsome, young, strong. And its not like you expected your step-mom to react the way she did but...well, ok. You did expect it. You were banking on it, actually. What better gift to give your step-mother than a deep, deep massage? Something oiled and sensual. Something that leaves her truly relaxed. Even if that means taking some unconventional steps....like massaging her thighs, up between her legs...rubbing her until you can see her get wet, pulling her close so she can feel your bulge while you run your hands up and down her oiled, soft body. God, she's such a MILF. You get her so worked up you barely even need to suggest your "internal, deep penetration massage" before she's spreading herself for you, acting like she's just going with your "professional recommendation," while you slide your oiled cock inside her wet and hungry pussy. The perfect birthday gift!