"This is taking it to an extreme that doesn't need to be met with a six year old. Now my son is asking questions. what is sex mommy? That should not ever be said, sex. Not in a sentence with a six year old," she said.
District superintendent Robin Gooldy told The Associated Press on Tuesday the boy was suspended because of a policy against unwanted touching.
"The focus needs to be on his behavior. We usually try to get the student to stop, but if it continues, we need to take action and it sometimes rises to the level of suspension," he said.
He said officials have not heard from the girl's parents, and no legal action is anticipated because it was only a violation of school policy.
In recent years, Colorado and other states have been moving to relax zero-tolerance disciplinary policies blamed for increasing the dropout rate and giving students criminal records for relatively minor infractions. However, those policies have dealt mostly with safety issues, such as students fighting or bringing a replica gun to school, not sexual harassment.