In a small bowl combine juice from 1 lemon, lemon zest and lemon sugar and stir.
In a large mixing bowl combine condensed milk, cream cheese and the lemon mixture. Beat with an electric mixer at a high speed for 3-5 minutes until smooth and thick.
Wash very well and wipe the beaters of the mixer before whipping the cream.
In another mixing bowl whip the cream until stiff peaks form. Using a rubber spatula fold the cream into the condensed milk mixture, until well combined.