My girlfriend's sexual desire leads to a bet and a promise of oral pleasure

My girlfriend has always been the kind to keep her sexual desires to herself, but lately she's been hinting at wanting to spice things up. I've been trying to figure out what exactly she's into, and the other day I stumbled upon a video of a guy fucking his girlfriend's tight asshole. I showed it to her, and as expected, she got pretty excited. So, I made her a bet that I could do just as well, and she agreed. After some teasing and ass shaking, I finally gave in and went down on her, promising that it would be worth it. And let me tell you, it definitely was. She's a hot, sexy babe with big tits and a big, juicy ass that's just begging to be fucked. I'm definitely glad I followed through on my promise, because now I know just what she's into.