It is not per se illegal to kiss and hug a minor (I hope parents do it as much as possible) but if this is someone who is attempting sexual or inppropriate contact with this child, then yes, they can get into trouble, fast.

Can you hug a minor?

Is it a Crime for an 18-Year-Old to Hug and Kiss a 17-year-old? | California Penal Code section 647.6. Under section 647.6 of the California Penal Code it is a crime for any person to “annoy or molest any child under 18 years of age.”