Who is to blame when married men sleep with the house help?

We live in a world where wives see their househelps as enemies. They size them up. They pick the most undesirable, the most uneducated, the most rural of all because they have the duty to protect their husbands from being stolen as if they were a stash of money or a lifeless object that cannot speak for itself.
Unequivocally, we also live in a world where men prey on the househelps. They start getting home earlier than usual and in no time the househelp is pregnant. There are families where househelps do not last more than three months because the man of the house makes it his absolute mission to have an affair with every naive and willing woman who steps into his house to help with household chores.

Wife to blame?