In a large skillet over medium heat, melt 1 tablespoon butter and olive oil. Add shrimp, lemon slices, garlic, and crushed red pepper flakes, and season with salt. Cook, stirring occasionally, until shrimp is pink and opaque, about 3 minutes per side.
Remove from heat and stir in remaining butter, lemon juice, and white wine. Season with salt and garnish with parsley before serving.