Heat the lemon juice and white wine in a saucepan over medium heat. Bring to a boil and reduce by one-third. Add cream and simmer until mixture thickens, about 3 to 4 minutes.
Slowly add butter, about 2 tablespoons at a time, until completely incorporated, whisking constantly. Season with salt and pepper. Remove from heat and keep warm.
To serve: Place cooked pasta on each plate. Add half of butter sauce to chicken mixture and toss. Place chicken mixture over pasta. Add more sauce on top of each piece. Garnish with parsley.