. >> a bch, b, d, e. >> she was changing diapers 24/7, washing diapers, not permitted to use pampers. had to use cloth diapers because they were more basic. they were the salt of the earth. return to, you know, disassociate from materialism. return to the basics. >> so there's no question that she was stressed. >> andrea yates' life had begun to unravel. >> she seemed perfectly fine up until after we had luke, which was our fourth. >> after her fourth child was born, she actually struggled with the thought of killing her child, and she made a suicide attempt rather than risk harming her child. >> and there was one psychiatrist who saw her who told her and rusty, don't have anymore children. you need to stop. >> here we are on our way home. what does that say, boys? it says, "congratulations rusty and andrea. it's boy." giving us a little welcome home. yeah. >> just a year later, the yates were expecting their fifth child. ♪ ♪ ♪ ♪ [ male announcer ] if you can't stand the heat, get off the test track. get the mercedes-benz you've been burning for at the summer event, going on now at yo