I think the mother is being over protective. First off, even though the child is four, he needs to get some grip on reality. Tell him it's just a picture, about something that has nothing to do with the bus. What happens when an ad comes on TV of similar sorts? Or she doesn't let the kid watch TV? You can't protect your kid from every possible image that MIGHT have a negative interpretation. If that were the case, nothing would ever be on TV, there would be like 3 video games, he could never leave the house, and the dictionary would have 25% of the words in it. At some point, the child will be exposed to something negative, a parent needs to understand that that thing is negative, rather than try to shield the child from it. Certain things can wait, but something as trivial as that, IF it comes up, should be handled easily.
All I can say is that my life is pretty plain
I like watchin the puddles gather rain
And all I can do is just pour some tea for two
and speak my point of view
But its not sane..
I just want some one to say to me
Ill always be there when you wake
Ya know Id like to keep my cheeks dry today
So stay with me and Ill have it made
And I dont understand why I sleep all day
And I start to complain that theres no rain
And all I can do is read a book to stay awake
And it rips my life away but its a great escape..
All I can say is that my life is pretty plain...