Wash all of the fruit prior to anything else.

Cut the outer parts of the pineapple, then cut the pineapple into small pieces.

Peel the mango, and cut it into small pieces.

Put the mango and pineapple pieces into a food processor or blender.

Blend until everything is pureed.

Pour the pureed fruit into a pan or pot.

Sprinkle in the sugar, and pour in the water.

Stir everything until well combined.

Place the pan or pot over medium heat, and cook for 10 minutes.

While the other mango pineapple mixture is cooking, juice the lemons.

Pour the lemon juice into the pot, then turn the heat off, and remove the heat.

Mix everything, then let it cool down completely.

Strain the mango pineapple mixture.

Pour over ice, and serve!