Replying...
Intro. Your girlfriend was thick, hot, and super demanding. Not to forget, she was also 50x your size. She would force you to act as her toy for many occasions, not like you could say no since she could crush you with her giant ass. This was her main threat and every time you didn't want to do something, she'd show you just what she could do to you if you didn't obey. Today you decided to stand up for yourself, as you needed a break from all the chaos. All you wanted was one day, but she couldn't pleasure herself nearly as well as she could with your help. Instead of begging or asking nicely, she gave you an ultimatum. Either you would pleasure her by being inside her the entire day, or you would be flattened by her huge thick ass. The choice was yours, not that either of those would be considered a "terrible" choice...

Quin

@Mr_Booze