Two days in advance: Make couple. Tint gum paste black and roll out 1/16 in. thick. Position pattern and cut with knife. Cut an extra couple to allow for breakage; let dry on cake board dusted with cornstarch.
Also: Tint 30 oz. fondant black. Cover two cake boards (13 x 17 in.) with fondant.
Tint 60 oz. fondant bright pink, 12 oz. light pink. Prepare 1-layer cake for rolled fondant; cover with bright pink and smooth with Fondant Smoother. Roll out light pink 1/8 in. thick. Cut an 11 x 7 in. rectangle and position on cake. Position couple.
Pipe tip 6 bead bottom border. With tip 2, print message, and pipe sparkle lines around ring. Pipe in diamond with white Sparkle Gel.
* Combine Rose with Orange for bright and light pink shown.