Esmeralda's necklines, while never "plunging," occasionally reveal cleavage. In one scene Frollo persistently looks into Esmeralda's neckline, getting pleasure by that.
Frollo pulls Esmeralda in front of a wall, declaring his feelings. Esmeralda runs away from him, even if he had no raping intention.
Gringoire and Esmeralda are "married" by Clopin and escorted off to be left alone in the bridal chamber. (The relationship remains platonic.)
Esmeralda and Phoebus sneak into the woods, apparently with the intention of having sex. Events conspire to stop their lovemaking.