BOULDER COUNTY, Colo. -- A mother groped while riding her bike in unincorporated Boulder County didn't let the guy get away with it, according to the Boulder Daily Camera newspaper,

The newspaper reported Danika Bueno was riding home from the post office when a man on another bike rode up to her, grabbed her breast and sped off.

Bueno was riding with her 10-month-old son in a carrier on her back.

Bueno followed the cyclist. As she rode, she pulled out her cell phone and called 911.

According to the newspaper, sheriff's deputies caught up with the male cyclist at 63rd Street and Nautilus Drive.

Deputies arrested Nathan Wood, 34, of Longmont, on suspicion of unlawful sexual contact and child abuse, both misdemeanors.