Rob then told Larry he wanted to see if I was as good a cocksucker as I was at screwing. Larry assured him I was but Rob wanted to see for himself and withdrew from my pussy as he switched places with my boss. Larry knew I liked it from behind so he asked me to get on all fours which I gladly obliged. It would make it easier to suck Rob's big dick too. I was concerned about my ability to take all of Rob into my throat but I was about to find out. Larry was now fucking me, holding on tightly to my ass as Rob started...