How do I stop letting this bother me?

I watched an episode of Law and Order SVU and it has left me more than unsettled. It was about a mother who sexually abused her daughters. Even until the point where they were sleeping in the same bed and thought it was natural. This bothered me for several days. Then to top it off the lady I babysit for is still breastfeeding her 3 year old. The 3 year old also sleeps in her bed every night. The toddler asks if she could "drink booby" and "play with booby." the lady i babysit for is great she just cant seem to let her baby grow up a little bit, oh well, its her choice. This has made matters worse for my brain. I am tormented by what crazy parents do to their children. Sometimes when I see kids I get paranoid--to the point that I don't want to have any kids because I don't want to become like that. I know I won't be like my boss but my brain constantly over thinks it. Like I was even thinking breastfeeding is wrong... Please help my anxiety settle about this issue! Thanks...