Beginning at age 7, a little boy was sexually abused by an across-the-street adult male neighbor. Before the abuse started, the perpetrator groomed him and his parents, offering to babysit while his mom ran errands. Grooming is a word to describe how a perpetrator gains trust.
The perpetrator had two daughters roughly the same age. Nobody in the neighborhood knew about it. Nobody knew what to look for. The perpetrator was also abusing his oldest daughter - the little boy's second grade classmate.