Squeeze the lemons and the orange. Pour the juice through a sieve into a tall vessel. Add water and sugar and stir until the sugar has dissolved. Put in a cool place and serve with ice cubes.
If you like it sour or sweeter, you either take more lemon juice or more sugar. The lemonade will keep in the refrigerator for about a week. With us it doesn`t get that old, however.
We like to drink the lemonade well chilled for a barbecue in summer. I usually do three or four times the amount. Everything is always drunk.