 The man who accuses his wife of pre-marital sex has no proof about his wife when he accuses her, whereas by a sotah woman, the husband initially warned her not to seclude herself with a particular man, which she thereafter did.Therefore, whether she is innocent of the accusation of adultery or not, she still has caused reasonable suspicion in the eyes of her husband.The rabbinical interpretation of is that when a woman accused of adultery who was innocent drinks the bitter water, even if she was previously unable to conceive, she will now conceive and give birth to a male.