Add the gin, lemon juice, lime juice, simple syrup, heavy cream, orange flower water, and egg white to cocktail shaker without ice. Shake for 15 seconds (called a “dry shake).
Add ice to the cocktail shaker. Shake again for 30 to 45 seconds.
Strain the drink into an ice filled Collins glass or highball glass. Add a splash of soda water into the glass and allow to sit for 1 minute until foam separates.