Adultery means
Srimad-Bhagavatam
SB Canto 1
SB 1.9.27, Purport:
As far as the women class are concerned, they are accepted as a power of inspiration for men. As such, women are more powerful than men. Mighty Julius Caesar was controlled by a Cleopatra. Such powerful women are controlled by shyness. Therefore, shyness is important for women. Once this control valve is loosened, women can create havoc in society by adultery. Adultery means production of unwanted children known as varṇa-saṅkara, who disturb the world.