The sudden release of the dam was too much for Helena.  She was barely aware of Mark as it hit her like a tidal wave.  Her mouth opened in a soundless 'O' as her back arched and her entire body shuddered and convulsed.  She bucked her hips up and down, her hands closed on the bedding, and she repeatedly clenched and released around Mark's cock.<br/><br/>The orgasm dragged on and on.  She sucked in a ragged, shuddering, breath, then her head swung back and forth.  Her body rolled, bucked, and twisted, as if she was seeking some escape.  It was too much, an overwhelming crush of sensations that had short-circuited her brain and her body.  She was no longer fully conscious, her entire focus just on the pleasure.<br/><br/>She barely noticed the slaps.  It was pain, but may as well have been pleasure.  It melded with the overwhelming cacophony of sensations.  She kissed back, desperately and hard, her vision starting to go grey as she held her breath to do so.  As she pulled away, she sucked in a gasp, but there was no focus, no thought.<br/><br/>Only when he came inside her did it all begin to fade.  The shudders and shivers grew less, her breathing returned to a more normal pace of heavy breaths, her back fell back down from where it had been arched.  She felt drained, weak, spent.  She lay there, covered in sweat, just trying to catch her breath as she felt Mark empty the last couple spurts into her abused body.