My Gym Coach is a Home Wrecker

Description: It's my birthday and my sexy gym coach invited me to her place for a pizza celebration... i know my girlfriend won't agree on that, but it's just a pizza, right? what seems to be an innocent celebration became a sexy night as she teased me about her being my birthday present and me dumping my flat chested girl... in the end i think her plan to end my relationship might happen. she has a good point, or two...