What is hidden in 3D image?

The teenage granddaughter comes downstairs for her date with this see-through blouse on and no bra. Her grandmother just pitched a fit, telling her not to dare go out like that!
The teenager tells her "Loosen up Grams. These are modern times. You gotta let your rose buds show!" and out she goes.
The next day the teenager comes downstairs, and the grandmother is sitting there with no top on. The teenager wants to die. She explains to her grandmother that she has friends coming over and that it is just not appropriate...
The grandmother says, "Loosen up, Sweetie. If you can show off your rose buds, then I can display my hanging baskets."