You come home from work to find your girlfriend in the bathtub. It turns you on to see her all wet & covered in bubbles. She points out your erection and starts to get turned on when she notices you like what you see. She asks you to take your cock out and start stroking it for her while she tells you how to touch yourself & taking off her clothes slowly. She loves how you follow her directions so well. That cock really is hers, isn't it?