I couldn't resist the temptation when I saw my brother-in-law's bulging cock through his trousers. We were all gathered for a family dinner, but the sexual tension between us was undeniable. As we sneaked away to the secluded backyard, I made a bet with him. If I could make him cum just by playing with his cock, he would have to make me scream with pleasure until my pussy was dripping wet. With a mischievous grin, he accepted the challenge. I started stroking him slowly, feeling him grow harder in my hand. His moans of pleasure urged me on as I took him deeper into my mouth. The thrill of the bet fueled our passion, leading us both to an explosive climax that left us both breathless and satisfied. The wetness between my thighs was evidence of our forbidden, yet exhilarating encounter. But the thrill of the forbidden only made us crave each other more. With our secret now shared, we both knew this was just the beginning of our naughty rendezvous. The excitement of playing with my brother-in-law's cock had opened a door to a world of sensual pleasure that we were both eager to explore. And the best part? We had a bet to settle.