J.A.
It sounds to me, like that little 4 year old, is a bully. Why should you and your son be compromised, to accomodate such ignorance? I would say, that, although the mother and son think that this activity is okay, you and your son do not. I would definitely stick up for your son, and I would say something. Without a doubt! There are plenty of other activities that 2 boys can be involved in, that is more healthy and stimulating.Do not ignore this unhealthy behavior, and handle it with finesse.