Please help....shall i continue relation?????????

I am newly married and i love my cute wife very much.she is only 20 years old and good looking............Since couple of weeks i got a girl from net......we chat randomly while i am in office.....and next we meet ..consequently we involved in a relation.....we touched each other,kiss and..............but no yet...............but i am very hungry for ..... i know if i persude her ,,may be she also enjoy ......... but the problem is i think that should not be fair...and could be Treachery for my wife....one thing you people should know i dont love that girl but my wife...i only love her body as she is really gorgeous...............but that poor girl think i love her very much.......and she give her body for sake of love only..... since i dont love her ,so taking to bed would another treachery..and beyond dishonesty..............what shall i do now??????????