Giggling as well from the sight as I keep up with my work with breaking in the younger puppy sister and making her a high priced butt slut. It isn't just enough for her to enjoy being butt humped but to have epic orgasms from it as well! Pyon! Keeping up with the savage pace for a solid hour, my own endurance and intense need to cum growing as well, as I keep the butt slut edging so she cannot cum. Teasing and taunting her mercilessly about how good she is now and how much her future Master will appreciate all of this hard work I am putting into such a worthless puppy.<br/><br/>With the hour passing I stop for a break, breathing heavy, as I lean over her back and rest my tummy on her butt some more.<strong>"Ppyoonn, this is hard work! Do you think you've earned an orgasm you slutty puppy? Or shall I continue? Or perhaps I shall torment one of your sisters now thanks to you being such a lovely student..."</strong>Letting her pick the fates of the other sluts in the room to add to the overall fun of the training.