Place it before you," he instructed. "Y... Yes, Sir," I said, doing as he asked and looking up at him. "A collar has four functions. The first is to m...ke you easier to tether." He winked and I shivered, a smile spreading across my face. "The second is to visibly identify you as a submissive. And the third is to impress your submissiveness on you... to remind you of who you are. These things you have experienced with your training collar. I have decided your training period is now at an end.". I inserted my dick from behind and started fucking her. I grabbed her hip and thrust my dick in and out, in and out.Yasika: Ahh, brother, don’t stop.Me: I won’t stop until you reach orgasm at least twice, sister.Yasika: Oh my God.After a while, she reached an orgasm and started to breathing heavily.Yasika: Bro, I can’t stand anymore.I turned her around, kissed her on the lip, pushed her down in bed, inserted inside her pussy. I fucked her for at least 10 minutes. She screamed in pleasure even. “Why don’t you show me how much you love me.” Just then she mounted me, and I got excited, real excited. Then with the worst timing ever, we heard our parents coming. She quickly jumped off me and got back under the covers, and not a moment too soon. Our parents came in and saw us holding the gifts we had gotten from each other. “Happy birthday you two!”“Oh look they gave each other a gift,” our mother said smiling. “Come on honey, let’s leave these two to their business,” our dad said while. . Mom?" She got really embarrassed and she turned around so that she could not see my cock."No, Honey. I was just going to make sure that you were up in time to get ready for school, with finals starting and all." That was all she said as she reached back trying not to look at me as she pulled the door closed behind her.Before leaving this morning, Mom told us she was going to miss us while she was gone. But she looked forward to getting back on Wednesday afternoon. She gave each of the girls a.