I started pausing more frequently and pressing my tongue to her asshole more insistently until more of it slid into her barely expanding hole. Heather's knees shook a bit more with each thrust of my tongue. This continued for several minutes before I swirled my thumb more rapidly around her clitoris and pressed my tongue completely into her rectum and held it there a moment. Still playing her clit, I began to saw my tongue slowly and deeply in and out of her ass. I was tongue-fucking her butt now and her knees buckled partly in response. I panted through my nose and continued sodomizing her and circling her clitoris....