<strong><span class="bbc_u">Pet</span></strong><br/><br/>She would clench her thighs around your sides.  As she rode your bucking body.  Of course the restraints were set that you could not buck all that much.  For you could only rise to your knees.  You could not pull your hands back.<br/><br/>'Smack'<br/><br/>Echoes in your ears, just as you feel her hands slap your clenching butt cheeks.  An then you feel her spreading those cheeks forcibly open.