To be fair maybe the wife friends, parents, coworkers, other parents at school, etc... are dumb and can't check the dates and are applying the social pressure. Maybe the other children at school are calling the dad a man-whore. Maybe the husband had a bi-curious period years ago and is now being called out. Maybe the husband works for an uptight bigot boss. Nothing necessarily immoral by mainstream standards, but the individual consequences can be quite high.