Bring a large pot of salted water to a boil. Add the lobster and cook for 8-10 minutes until it turns bright red.
Remove the lobster and allow it to cool. Extract the meat from the claws, knuckles, and tail. Cut the lobster meat into bite-sized pieces. Set aside.
Cook the Pasta:
In the same pot, add the fettuccine and cook according to the package instructions until al dente. Drain the pasta, reserving about 1/2 cup of pasta water. Set the pasta aside.
Prepare the Alfredo Sauce:
In a large skillet or saucepan, melt the butter over medium heat. Add the minced garlic and cook until fragrant, about 1-2 minutes.
Add the heavy cream and bring to a gentle simmer. Reduce the heat to low and let it simmer for about 5 minutes, stirring occasionally.
Gradually whisk in the grated Parmesan cheese until the sauce is smooth and creamy. If the sauce is too thick, add a bit of the reserved pasta water to reach the desired consistency.
Stir in the nutmeg, salt, and pepper to taste. If using, add the white wine and simmer for an additional 2 minutes.
Combine Pasta and Sauce:
Add the cooked fettuccine to the sauce, tossing to coat the pasta evenly. If needed, add more pasta water to loosen the sauce.
Add Lobster:
Gently fold in the lobster meat and cook for another 2-3 minutes until the lobster is heated through.
Serve:
Divide the lobster fettuccine Alfredo between two serving plates.
Garnish with chopped parsley and serve with lemon wedges on the side.