The ornamental design for a statuette of a couple, as shown and described.
FIG. 1 is a front perspective view of a statuette of a couple, showing my design;
FIG. 2 is a front-left perspective view thereof;
FIG. 3 is a left side perspective view thereof;
FIG. 4 is a rear-left perspective view thereof;
FIG. 5 is a rear perspective view thereof;
FIG. 6 is rear-right perspective view thereof;
FIG. 7 is a right side perspective view thereof; and,
FIG. 8 is a front-right perspective view thereof.
The broken line showing in the Figures illustrates portions of the statuette of a couple and forms no part of the claimed design. The bottom of the statuette of a couple is flat and unornamented and forms no part of the claimed design.