Rub and Tug
After Keira gives you a very long slow massage, she is cleaning up as you get dressed and sees that you are peeking up her skirt. She has noticed your attention to her short skirts over the last few sessions and now she wants to see what you will do if she calls you out on it. To her surprise you take out your cock and start to stroke it, Keira likes what she sees and lifts her skirt for you to get a better view.
As you wank harder for her she slips off her panties and spreads her pussy so you have the perfect view to cum over.